mostly cloudy skies, 4554 in san jose. big place to be this evening. 56 right now. as we head through the radar views. a few hit and miss showers around the sunol grade. the showers are coming from the northeast and heading to the south because of an area of low pressure over southern california just slowly moving out of here. for the rockies versus giants game, numbers in the low 60s, few passing showers possible after 1:00 and then sharks/predators coming up 7:00 tonight in san jose. we'll see decreasing showers. that is the trend as the low begins to move on and the all-important mom's day forecast, showers in the sierra but improving continues around the bay area. the rise in temperatures we can expect as we head towards sunday coming up in a few minutes. >> thank you, rob. developing story this morning, a devastating loss for san francisco after a deadly stabbing. the victim is a well-known former public defender for the city. police found the body of marla zamora at her home in potrero hill yesterday morning and say she was stabbed multiple times and died at the scene. you may remember zamora served as a defense attorney for edwin ramos convicted in the triple murder trial back in 2012. today many of her former co-worker and friends are at a loss. >> marla had a heart of gold. she exemplified what a public defender should be. >> marla was a fun-loving person. >> officers have detained one person and are not actively looking for anyone else at this time. no word yet on the motives. this is video of the chaos that erupted at san francisco's city hall last night. dozens of protesters are pushing for change, demanding that police chief greg suhr be fired. they say they want reform in a racist department from top to bottom. members of another group called the frisco five are now on the 17th day of a hunger strike. yesterday several of them had to be taken to the hospital and in spite of their deteriorating health they vow to continue that strike. >> the frisco 5 they started a new kind of movement that has grown. people are coming together. people are upset. the unjust going on in this city. >> officers made several arrests last night and many protesters say this is the beginning of many planned disruptions. now to decision 2016. another bay area visit for democratic candidate hillary clinton. she spoke at an oakland school yesterday morning before heading to san francisco where she was met by many angry protesters. >> hillary has never had a war she didn't like. >> it will be chaos. and the issues here, raising more money and lying to people. >> clinton was also greeted by roughly 2500 supporters. senator dianne feinstein introduced the former secretary of state with a positive message. >> she's an amazing human being. totally qualified and would make a strong and positive president. >> all eyes will be on california for the primary on june 7th. meantime donald trump was in oregon last night for his first visit to the state. more are saying they won't endorse or vote for him including jeb bush and south carolina senator lindsey graham. new details this morning about a massive wildfire in canada. firefighters are bracing for another long day. they fear the fire could double in size by the end of tonight. large-scale evacuations still under way in alberta by land and air. the fire has burned about a quarter of a million acres. >> this fire is so immense and so out of control, what we need is a drop in the temperatures and a good soaking. >> somed in good news there. rain in the forecast. millions of dead trees are making the fire extremely difficult to stop. . a follow-up to a shocking murder now three years later in oakland man was found guilty. he faces life in prison or the death penalty. yesterday darnell williams was convicted of killing 8-year-old allaysha carradine and 22-year-old anthony ma dre as. the girl shot to death during a sleepover at her friend's house. williams was trying to get revenge for his friend's death and thought his target was in that home. williams shot and killed madrayasduring an unrelated fight. both of the victims' families have been waiting for this verdict. >> guilty. >> we just got closure today. appreciate the closure we got. >> his sentencing hearing is scheduled later this month. a man accused of sexual assault is behind bars. adam berglund arrested yesterday in san francisco. here he is on surveillance video. police say he followed a woman in the fillmore neighborhood on thursday and attacked her. thankfully she was able to get away. police sent out a crime alert within the department and an officer recognized the suspect and brought him into custody. there will be no b.a.r.t. service up till monday between san leandro and the bay fair stations. b.a.r.t. will make repairs to the track and equipment. b.a.r.t. is offering free bus service between the two stations this weekend but should map for some delays. much more ahead on "today in the bay" -- coming up, a new development in the sexual assault investigation involving a former niners player. the legal battle is heating up. also, president obama points the finger at silicon valley tech companies. why he says financial loopholes are hurting the economy. you're watching "today in the bay." >> live look outside this is dublin little rain today but clearing tomorrow for mother's day. at 7:09. continuing coverage of 49ers star accused of sexual assault. is it a valid request or desperate legal move? attorneys nor dana stubblefield want to block the santa clara district attorney's office from prosecuting his case. "today in the bay's" has more. >> reporter: police arrested former 49er dana stubblefield this week charged with raping a developmentally disabled woman at his morgan hill home last year. in a press conference stubblefield proclaimed his innocence and his attorney is asking that district attorney's office be removed from the case because of comments made in press releases and to the media. >> we feel that some of the information that really was slanted in one particular way about witnesses and the victim in the case, was really put out to prejudice, not to inform the public. >> reporter: his attorney says he filed a motion in santa clara county superior court to help his client get a fair trial. >> so we feel that the case now needs to be handled by an impartial body. they're asking for the attorney general's office to rename a prosecutor in this case so mr. stubblefield can get a fair hearing. >> reporter: the district attorney's office said our response is the evidence we will present in court. we seek justice for the victim and people. this legal analyst says it's unlikely the attorney general will prosecute the case. >> the pretrial publicity even if not liked by the defense would not be sufficient to generate a recusal of the entire d.a.'s office. >> reporter: but he says there may be another outcome. >> what you may see as a result of this motion is that a judge steps in and issues a gag order. >> reporter: nbc bay area news. much more ahead on "today in the bay." coming up -- are tech companies getting an unfair advantage when it comes to match-up. the president says yes. and he has a plan to fix it. >> our saturday starting off with quite a few clouds. as the radar shows a few scattered showers to start the weekend. what does it mean for mom's day sunday. a look at changes in your forecast. when we come right back. i want to show you some cutting edge technology. this is a vhs tape. push that tape in and hit play. this is a flip phone. have you seen these before? it's called a compact disc. oh. looks like we're getting a facsimile. what year is it to you? it's old. you'd rather use newer technology? definitely. well, i've got something to show you. this is the 2016 chevy volt. it uses extended range electric technology. the prius hybrid uses battery technology developed 15 years ago. chevy expects volt drivers to get over a thousand miles between fill ups. it's got every technology there is. the prius actually belongs on the table. you're watching "today in the bay." good morning. let's take a live look outside. palo alto a little clouds out there and it could be a rainy kay. now there's a little slice of san francisco in indianapolis. sales force is expanding to the midwest and is renaming the tallest building in indy. ceo mark benoff tweeted the news that chase tower will be called salesforce tour. they lease several floors of the building and plans to hire 800 by 2021 in additional to the 2 1 100 employees there. the law was later revised. the latest job report is out and shows a slowdown, also president obama aims an attack at silicon valley companies which he says are costing the country billions. 160,000 jobs were created in april. economists had predicted about 200,000 new jobs. experts say one reason could be that the president tried to turn the focus to big companies paying taxes overseas instead of here in america. our business and tech reporter has the story. >> reporter: tech companies are among america's biggest profit generators. but some have used financial loopholes to pay some of their taxes overseas at lower rates than what they would pay here. president obama addressed those loopholes directly. >> in america no matter how wealthy or powerful, you should play by the same set of rules as everybody else. >> reporter: one law pro if fes fesser estimates company using loopholes deprives the american economy of as much as $150 billion in revenue each decade. apple alone is said by some to have saved close to $30 billion by paying a chunk of its taxes in ireland, rather than in the u.s. the president says lawmakers should act. >> which would not only give people greater confidence in the system but good for our economy. it would make sure families and small businesses who don't have fancy lawyers and cabinets are being treated the same as big corporations who do. >> reporter: a white house request to bring more of the money back home. scott budman, nbc bay area news. if you wanted to work for tesla today is your chance. a big job fair today. tesla needs hundreds of production assembly associates and material handlers. starting pay $17 an hour. the event is this morning in newark. register at west valley.com before showing up. rob is here, a little rain coming in. see green on the map behind you. >> yes. for may that's unusual to be talking about as much rain. the trend will be interesting for tomorrow morning and to wrap up the weekend. right now a lot of gray skies around the bay area but not much in the way of too many rain drops yet. there's the view from emeryville looking back from san francisco. gray skies and also a few more gray skies around the south bay. 56 degrees in san jose. there you see dublin 54 mostly cloudy and a few sprinkles, 63 right now over in san francisco. so we've got the showers here coming in from the north, and notice the mostly cloudy skies. not a lot of rain underneath the showers, at least right now. but what we're watching here is a little more moisture to the north and this little spoke of energy is going to rotate down over the bay area, right around midday today. so we'll see the rain at times probably picking up a little bit as we head through the afternoon. watching this batch around midday into the early afternoon and scattered showers into the evening and rain totals here not really all that impressive as we had yesterday almost 0.2 of an inch of rain in some spots today. highest totals, though, will be around the north bay. so morning temperatures in the mid 50s as we head towards noon, numbers in the low 60s and highs today mostly in the mid 60s around the bay area. tomorrow, though, we'll begin to see temperatures starting to climb up as you see at the bottom of the screen at the seven-day forecast. so rain at times, nothing heavy, but mid 60s around san jose. low 60s closer to san francisco. and north bay and tri-valley temperatures in the low 60s. now for the early afternoon game for the giants plan on a few passing showers but the rainfall rates not expected to be too bad out there and by the time we head towards the evening around san jose for the sharks game coming up at 7:00 we will see decreasing showers which is part of the transition to a drier forecast here for the second half of the weekend. so still some lingering showers by 11:00 tonight in the north bay and during the day sunday, partly cloudy skies, some late afternoon clearing around the bay area and yes, sunday's forecast does look a little warmer. low to mid 60s today and notice sunday now as winds begin to pick up out of the north, the north bay numbers starting to climb into the low 70s and few spots to wrap up the weekend and monday skies continue to clear part of a transition that will lead us to warmer temperatures this low will finally move away from the west coast and behind it now, high pressure starting to build in. by the time we get to tuesday, wednesday and thursday, now we're talking temperatures in the 70s and 80s. so we have a chance of showers today. maybe a little more into sunday but what's interesting about this extended outlook for san jose, notice over the next five to ten days, heading into next weekend, things may be trending much drier now as you see numbers starting to climb to the mid 80s by wednesday and thursday, cooling into the gypping of next weekend and that temperature trend holds up for san jose, san francisco could see numbers climbing closer to 70 by thursday and really no signs of showers after that and the extended forecast and tri-valley too could see temperatures climbing, mid 70s by tuesday and numbers in the low 80s towards the middle part of the week, next weekend at this point looks relatively dry. the extended forecast through the 18th, looks pretty dry. we've had unusually high numbers of rain chances over the last couple days but the next ten-day outlook extended forecast for the middle part of the month looks drier with temperatures having a chance to hit the 80s beginning as early as the middle part of next week. back to you. >> thanks, rob. much more ahead on "today in the bay" -- coming up -- >> it was a struggle initially. i had given my wife a day i was going to commit suicide. >> the dog isn't just a guide dog. how he was able to save his owner's life as he struggled with losing his eyesight. today's bay area proud. you're watching "today in the bay." >> we've seen incredible rescue dogs save lives after a natural disaster. but in today's bay area proud another type of dog his work is quieter but as powerful. >> reporter: tom lost the fingers on his left hand years ago in an industrial accident. he says honestly that wasn't too much of a burden to overcome. losing his eyesight years later that was. he only overcame it, though, with the help from others, both human and animal. and wants to now help out in return. >> good boy. >> reporter: in a world where people talk about counting steps tom still speaks in miles. >> we're averaging 50 miles a week. >> reporter: tom and his guide dog have been up and down the san ramon section of the iron trail. >> we're haekds towards the barn. >> reporter: an open question who is leading whom these days. >> good boy. >> reporter: no question, tom says, though, where he would be without his campaign yop. tom, you should know has always been the active type. running and golf were given, but tom was an expert barefoot water skier. in 2007 almost overnight, a medical condition took much of his eyesight and almost all of his hope. >> it was a struggle. initially i had feeling i was going to commit suicide about two months after this happened. >> reporter: with the help of doctors and others, tom says, he made steps toward an emotional recovery. but it wasn't until dynamo showed up that he put real distance between himself and depression. >> always something missing and after about a year, that something wasn't missing anymore. in other words, just piece of my soul filled in now. >> reporter: sfral based guide dogs for the blind who gave dynamo to tom and taught the two how to work together. grateful is he for what they did, tom now wants to help them. tom and dynamo completed a half marathon together and used their training as a way to raise money for the group. they raised enough to cover three years rent for one of the club's meeting spaces. the pair are also becoming regular speakers at guide dog for the blinds event. >> i can't thank you enough. >> reporter: he wants everyone to know just what a guide dog can mean and while the path they now travel every day is well worn. >> good boy. >> reporter: part of a journey tom thought he would never be on. tom and dynamo are not a unique story. in fact, according to guide dogs for the blind they right now have over 2,000 pairs working together in the united states. garvin thomas, nbc bay area news. wow. if you know of someone doing something nice for others garvin would love to hear from you. go to nbcbayarea.com and search bay area proud. much more ahead on "today in the bay." coming up -- searching for in the wake of prince's sudden death. the questions investigators have for a bay area doctor. plus -- >> a bicyclist came speeding down a hill, hit me, knocked me down. >> we investigate the fight over bike access to mount tam and who's keeping you safe when you're on the trail. when consultant josh atkins books at laquinta.com. he gets a ready for you alert the second his room is ready. so he knows exactly when he can settle in and think big. and when josh thinks big you know what he gives? i'll give you everything i've got and then some... he gives a hundred and ten percent! i'm confident this 10% can boost your market share. look at that pie chart! boom! you've never seen a number like that! you feel me lois? i'm feeling you. yeah you do! let's do this! watch out he just had a whole thimble full of coffee... woot! woot! the ready for you alert, only at laquinta.com. la... quinta! yeah! ♪ ♪ you live life your way. we can help you retire your way, too. financial guidance while you're mastering life. from chase. so you can. from nbc bay area this is "today in the bay." good saturday morning. 7:28. a live look outside golden gate bridge. a little cloudy out there. good morning. thanks for joining us. i'm michele roberts. rob has been telling you today is the day to stay inside, tomorrow with your mom go out and enjoy no the weather will cooperate which is the good news. second half of the weekend we will see clearing skies. radar picking up a few showers around the santa cruz mountains and around san mateo and san francisco to the north bay and the showers interesting moving from the northeast to the southwest during the day today. we'll see a chance of showers picking up right around midday and then by mid afternoon numbers in the low to mid 60s for highs. for the giants game getting started just after 1:00, a few passing showers likely and by 7:00 this evening for the sharks game, san jose, we're looking at numbers in the low 60s with decreasing showers. that's the trend towards sunday the low will begin to move on which means an improving forecast sunday and some warm temperatures in the seven-day forecast. a if full look coming your way a few minutes from now. >> thank you, rob. we have breaking news this morning in the south bay where a two-alarm fire forced about 50 people to evacuate this morning. the flames erupted at an assisted living facility in san jose about an hour ago. this is on the south 9th street near san jose state and 280. crews say the fire may have started in the kitchen when someone was cooking. the fire has been put out and no official word yet on when people can go back inside the building. new this morning, san jose police need your lep to find an elderly man. officers say 91-year-old roberto ruiz was last seen friday and speaks spanish and may be in mexico. he has been diagnosed with alzheimer's considered to be at risk. last seen wearing a gray sweater and white shoes before he went missing. if you have information you're asked to call the police. developing story this morning a devastating loss for san francisco after a deadly stabbing. the victim is a well-known former public defender for the city. police found the body of marla zamora at her potrero hill home yesterday morning. they say she was stabbed multiple times and died at the scene. you may remember zamora served as a defense attorney for edwin ramos convicted in the triple murder trial in 2012. today many of her former co-workers and friends are at a loss. >> marla had a heart of gold. she exemplified what a public defender should be. >> marla was a fun-loving person. >> officers have detained one person and are not actively looking for anyone else at this time. no word yet on the motive. now this is video of the chaos that erupted at san francisco's city hall last night. dozens of protesters are pushing for change, demanding that san francisco's police chief greg suhr be fired. they say they want reform in a racist police department from top to bottom. members of the another group called frisco 5 are on the 17th day of a hunger strike. several had to be taken to the hospital and in spite of their deteriorating health they vow to continue their strike. >> the frisco 5, they started a new kind of movement that -- and it's growing. people are coming together, upset, the unjust going on in this city. >> officers made several arrests last night. many protesters say this is the beginning of many planned disruptions. now to decision 2016. another bay area visit for democratic presidential candidate hillary clinton. she spoke at an oakland school yesterday before heading to san francisco where she was met by many angry protesters. >> hillary has never had a war she didn't like. >> it will be chaos. the issues here, raising more money and lying to people. >> clinton was greeted by 2500 supporters. senator dianne feinstein introduced the former secretary of state with a positive message. >> she's an amazing human being. and totally qualified and would make a strong and positive president. >> all eyes will be on california for the primary on june 7th. the nation's largest for profit art school is in hot water. san francisco's academy of art has been slapped with a lawsuit. city attorney dennis herrera claims the academy of art has illegally converted 23 apartments and hotel buildings into student housing. taking away hundreds of potential affordable housing units in the city and the city is now suing the school. >> the civil complaint i filed in san francisco superior court this morning details a decade's long pattern of violations in which an array of corporate affiliates schemed to purchase and lease properties for aau's use city wide. >> san francisco is calling for the academy of arts to pay potentially millions of dollars in penalties and reconfigure them for residential use. lawyers for the school say only seven buildings are in dispute and say the school isn't apply for zoning changes because it was dealing with a spike in enrollment. jo new details this morning about a massive wildfire in canada. firefighters are bracing for another long day. they fear the fire could double in size by the end of tonight. large-scale evacuations still under way in alberta by land and air and so far the fire has burned about a quarter of a million acres. >> this fire is so immense and out of control. what we really need is a drop in the temperatures and a good soaking. >> some good news there. rain is in the forecast, however officials say millions of dead trees are making the fire extremely difficult to stop. >> music lives on, thousands of prince fans danced and sang at a free memorial concert in los angeles last night. the celebration of prince's life included a performance by stevie wonder. prince died on april 21st at his home in mminnesota. he was 57. his exact cause of death has yet to be announced. as the investigation into his death continues a mill valley doctor and his son are being caught sought for an interview. dr. howard corn it felds and his son are not accused of any wrongdoing. investigators want to know more about their relationship with prince. the doctors specialize in addiction. the day before prince died a member of the musician's staff contacted the doctor for help. >> much more ahead on "today in the bay" the sharks will play their biggest game of the year at the tank. the latest on steph curry's recovery. you're watching "today in the bay." >> a live look outside at sap center. a packed house is expected for one of the biggest sharks games in years. san jose and nashville are locked in a 2-2 series tie. the sharks need two more wins to advance to the western conference finals for the second time in franchise history. game five is tonight at 7:00. the nba playoffs now, the warriors are in portland getting ready for tonight's pivotal game three. in case you haven't heard it's official no steph curry again. but here's the good news, curry did light drills yesterday and still nursing the knee injury. the team says curry could return for game four on monday. ♪ >> it was a metallica night at the giants game. they all love the giants. the lead singer sang happy birthday to mayes. he turned 85. the giants beat the rockies 6-4. >> 80 of the best women bowlers in the world are in town. the sonoma county open. if that doesn't sound familiar there's a good reason for that. >> reporter: until 12 months ago the nationwide professional women's bowling association didn't even exist, he at least not since 2003. and now look. the best of the best are gathered here at the double-decker lanes vying for a top prize of $10,000. and now we've got 13 events, four majors. this is fantastic for ladies. it's great where there is history here where they've conducted pba events and know what it takes to throw a great event. >> reporter: resident emily grew up wanting to play professionally and then the tour went on a 12-year hiatus. needless to say she's thrilled to get a second chance at it. >> it's kind of surreal. it's the first w pba event. a lot are looking forward to this so long, i've been looking forward to this since i was a junior in high school. i'm really excited. >> she is similar to many of the players, aside from her new bowling career, she has a regular full-time job. same goes for tim and jaclyn. he's a contractor, she's a district manager, they both played professionally when they can and as you can see they've chosen to make it a family affair. >> bowling is our life. that's my drug of choice. it's what kept us together. we've been married 13 years. this is our first born. so we work all day and then bowl all night. >> and they wouldn't have it any other way. >> bowling family is a happy family. >> reporter: the tournament runs through saturday night. colin risch, nbc bay area. >> much more ahead, sniffing out cell phones. we go inside a local prison where a canine is fighting crime with his nose. >> we're seeing a cloudy start to the weekend and showers moving through the bay area. how much rain can you expect for your mom's day weekend plans. we'll answer that question when we come right back. and at 7:42 this saturday morning starting off with gray skies in san jose. 56 degrees towards dublin right now. low clouds over the hilltops approaching the sunol grade. 55 into san francisco, 57 degrees. going to head out to the coast you're looking at drizzle and a little light rain out there by ocean beach. down towards santa cruz this morning 55. lots of clouds. and a chance of seeing some rain off and on during the day. the rain coming from an interesting angle here from north to south. you've got counterclockwise rotation with pressure to our southeast. on the northern flank of the low watching the rain dropping from north to south during the day today and if the low slowly moving out, today of the two weekend days we're expecting to see more of that rain. right now the low across southern nevada and by tomorrow afternoon, beginning to move towards arizona, utah and colorado and should take most of the showers away interest us. today we'll see the rain at times coming from north to south picking up perhaps around 10:00 early afternoon and changing over to more scattered showers, approaching the evening. mostly cloudy skies from morning to midday. 50s to low 60s. some rain at times. nothing expected to be too heavy out there. but in the central vallejo goy see thunderstorms in the central valley later today and mid afternoon temperatures around the bay area, low to mid 60s. today very likely the coolest day of the next seven days before high pressure starts to build back in. around the south bay should see low to mid 60s for high temperatures, mostly cloudy skies. san francisco up towards the north bay, low 60s for the afternoon and low to mid 60s around the tri-valley. start to the giants game we're calling for scattered showers at times. winds not too gusty. northwest from 5 to 15 miles per hour. in san jose 7:00 at the sharks game, big game coming up, low 60s around the start of the game. showers outdoors and decreasing showers towards 9:00 at night. 11:00 still lingering showers possible in the north bay and then early tomorrow morning, maybe just a brief shower and by the afternoon, now you're seeing partly cloudy skies, winds out of the north should help clear out our skies and temperatures will trend warmer on sunday. the big warmup holding off until about monday, tuesday and wednesday of next week. here you go, first half of the weekend. showers, temperatures in the 60s. sunday into monday temperatures begin to climb up and as high pressure builds, this may be the last chance for seeing rain for a while. the low will scoot to the central part of the country. high pressure allowing our temperatures to climb into the 70s and 80s. cooler than average temperatures to temperatures at average monday and tuesday and above average by thursday. the five-day outlook for san jose, ten day outlook shows the numbers staying in the 70s once we get past monday, warmest days of the week ahead at least, wednesday and thursday, numbers climbing close to 80 degrees around san jose. partly cloudy skies expected by next weekend. san francisco should see temperatures by the middle part of the week climbing closer to 70 degrees and increasing clouds towards the end of next week, next weekend. also for now looking relatively dry. the ten day outlook in dublin, climbing into the 70s, near low 80s for midweek temperatures and then a bit cooler as we approach next saturday and sunday. michele in. >> thanks, rob. much more aheaedead "today in t bay" hikers versus bikers who should have access to the trails on a popular bay area mountain. our investigative unit looks into what happens when there's bad behavior on the trail. they don't feel safe. thank you so much. did you say honey? hey, try some? mmm that is tasty. is it real? of course... are you? nope animated you know i'm always looking for real honey for honey nut cheerios well you've come to the right place. great, mind if i have another taste? not at all mmm you're all right bud? never better i don't know if he likes that. yeah part of the complete breakfast i want to show you some cutting edge technology. this is a vhs tape. push that tape in and hit play. this is a flip phone. have you seen these before? it's called a compact disc. oh. looks like we're getting a facsimile. what year is it to you? it's old. you'd rather use newer technology? definitely. well, i've got something to show you. this is the 2016 chevy volt. it uses extended range electric technology. the prius hybrid uses battery technology developed 15 years ago. chevy expects volt drivers to get over a thousand miles between fill ups. it's got every technology there is. the prius actually belongs on the table. you're watching "today in the bay." a live look outside. beautiful out there with the palm trees in san jose. could be some rain and clouds today but clearing tomorrow. mount tam in marin county is known for beautiful views but also home to an ugly battle between hikers and mountain bikers. the bikers want more access to the trails but the hikers say that would endanger their safety. senior investigative reporter vicky nguyen spoke with both sides who gets the right of way. >> reporter: the trails at mount tam can get crowded. bikers are looking for a place to avoid cars, hikers want a place to enjoy nature without worrying about bikes. data reveals when there's bad behavior on the moun neither can expect much enforcement. from breathtaking views where land meets ocean to thick forests where wood pickers find refuge, mount tam weather pluses 800,000 -- welcomes 800,000 visitors a year including those that examine for mountain biking that took root in the late 70s. we found mountain bikers sharing the trail. some report they're going as fast as 21 miles an hour using strava an app that uses gps to track speed. the limit on the trails is 15 miles an hour. records show over the past two years park rangers issued 6 bike citations, violations range from biking where prohibited to biking after hours, but none for speeding. >> there are the renegades out there that cause problems. >> reporter: superintendent da nita rodriguez oversees mount tam and the rangers responsible for enforcing laws. >> are you underestimating the amount of enforcement needed? >> we need more but we don't have the resources at this time. i can see where there's very few citations written partly because of the time to get wherever that violation is and partly because we do a lot of education too. >> it's unlikely you will catch a bicyclist in the act correct. >> reporter: they want access to a half mile stretch on the easy grade trail. mountain bikers need a way to get to the moun mop particular mountain theater without having to compete with cars on the road os. >> we're not asking for access to trails on mount tam. we're asking for something that addresses safety. >> reporter: the coalition off road director his group petitioned the state park for the change of use. >> i think you can provide the connectivity that bicyclists need and the safety that hikers enjoy. >> this is not a park. it was sent out to have anything like a mountain bike. >> reporter: a hiking activist on an uphill climb trying to keep mountain bikes off the easy grade trail. he worries about the environmental damage from bikes. >> when we cut downs the trees that will have to be cut down for this mountain bike trail, and we totally disrupt the water flow. and these are many rare threatened and endangered plants and wild flowers not found anywhere in the world. >> the speed is dangerous. >> reporter: the biggest concern for linda is safety. asked us not to use her last name out of concern from a hit and run. a mountain biker ran her down two years ago on the old railroad grade fire road and took off. >> a bicyclist came speeding down a hill around a curve, and hit me, knocked me down. i got all bruised and scraped all over one side of my body. >> reporter: linda doesn't want bikers on easy grade saying there's little accountability for those who break the law. >> we went to the ranger, reported it but there's nothing that can be done. we didn't know who he was. >> reporter: but mountain bikers feel they're at risk when riding on the roads. chp data shows officers were called to 20 bicycle accidents from 2014 to 2016. >> we're concerned. a lot of people don't realize that some choose mountain biking specifically because they're not comfortable biking out on the roads. >> reporter: in a place where both hikers and bikers are most comfortable out on the trails, the road toward a compromise is still full of bumps. the change of use proposal is now in the design and planning phase. the state parks department says it welcomes public comment. back to you. >> well if you have a tip for our investigative unit give us a call at 888-996-tips or an e-mail to theunit@nbcbayarea.com. it's no secret and no surprise criminals are tech savy many using new tactics including smartphones to commit crimes and pass messages in and out of pris. now the state is taking action. >> reporter: it may be map's best friend but for the inmate's at the california medical facility he's their worst enemy. for six hours a day, drayco slips, slides and sniffs under cell doors. >> drayco used to find marijuana, methamphetamine, heroin, cocaine, tobacco and cell phones. >> reporter: sergeant brian pile was the first handler in the state to train dogs to sniff for cell phones. >> we trained him to find a cell phone in 15 minutes. >> reporter: it's paid off. they find about 100 cell phones each year. he finds the owner and says okay. i found it where's my toy. >> reporter: he's probably disrupted the plans of dozens of gangs who use the cell phones to commit crimes from behind bars. >> you know, with cell phones they can still communicate between each other, gangs are alive and thriving, contraband, traffic in, is alive and thriving because of the cell phone. >> reporter: a report from the california department of corrections says inmates are increasingly smuggling cell phones inside, to coordinate criminal acts outside. in 2010, investigators linked 200 rhymes to calls made from -- crimes to calls made from in mate cell phones. leaders are working to jam signals in the prisons. >> good boy. >> reporter: until then, drayco is the state's best defense. >> that was rank reporting. it takes about an hour or two for prison staffers to search a cell where it takes drayco seconds. much more ahead on "today in the bay" -- coming up a lot of money up for grabs tonight. a lucky spot in the south bay where people are hoping lightning can strike twice. still time to figure out what you want to get mom's for mother's day. they want a nice plate of pizza. national restaurant association says that's the top of the list for one in four moms. ethnic food number two choice. mother's day is the most popular day of the year for dining out. we hope all the moms have a great day tomorrow. i think i've decided on a present for my mom. a powerball ticket. because the jackpot is really going up. it's at $415 million. it's been 18 consecutive drawings with no jackpot winners. customers at the dickson landing chevron station are hoping lightning will strike twice there. the gas station in 2014 sold $425 million winning powerball ticket. >> i don't buy lottery tickets. the guy was telling me it was big and i was like yeah, i'll get one. >> when it gets up here might as well throw my money away and it's worth a gamble. don't play can't win. >> your chance of winning is 1 in more than 292 million but never hurts to try. the drawing is just before 8:00 tonight. this is a big weekend for gamblers and horse lovers. yesterday -- or today the kentucky derby horses got last-minute training before today's race. this year's favorite nyquist and exaggera exaggerator. our coverage starts at 1:00 this afternoon. i don't know who i'm going to vote for. you don't vote, you gamble. >> yes. >> okay. >> power ball. >> thanks for joining us. we'll have a special stanley cup post-playoff news cast at 7:30 tonight. have a great day and happy early mother's day. ♪ zooming in from outer space to see what we are doin' ♪ ♪ tiny little astronauts ready to get to it ♪ ♪ intergalactic scientists earthbound on a mission ♪ ♪ they're the brightest of the best ♪ ♪ a team of friends upon a quest ♪ ♪ all aboard they send reports of projects they are doin' ♪ ♪ question and investigate there is nothin' to it ♪ ♪ make a guess and do your best ♪ ♪ gathering the data - find out, floogals. go! ♪ they're a band of cosmic friends ♪ ♪ tiny happy aliens ♪ blast off to another world secretly exploring ♪ ♪ when they land upon the earth nothing's ever boring ♪ ♪ ♪ they might have landed in your room ♪ ♪ be testing in the kitchen or exploring in the bathroom ♪ ♪ have you noticed something missin' ♪ ♪ it's another undercover super secret day ♪ ♪ experimenting all the way ♪

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