is mourning the loss of his wife and his son. in a strange and tragic turn of events at the family home in gaithersburg. a domestic situation gone bad. and this case hits close to home for investigators, because at the center of it is one of their own -- a sergeant with 27 years on the force. dead is the sergeant's 25-year-old son. police say the officer opened fire on his child in defense of his wife, who was being stabbed. >> the officer observed his son attacking his wife with some type of sharp instrument, observed some type of stabbing motion. in an effort to stop this attack, the officer discharged a handgun and shot his son. >> reporter: the son died on the scene. police say the sergeant called 911. they say he stayed on the phone getting medical instructions until rescue crews arrived. despite his efforts, his wife died at the hospital. the family has lived at the home on lake catrine terrace for more than two decades. neighbors are stunned. >> the whole family. very nice people. very devastated by it. it hurts. >> reporter: were there any signs of trouble or -- >> no, never seen no seens of trouble. no, just everyday family. >> reporter: the officer is on administrative leave, which is routine in police-involved shootings. >> i think we can -- we can all imagine emotions that are being felt by him, by family members, by friends, by co-workers. it's a tragic situation, and, you know, we're at this point, we do have montgomery county does have a peer support team that will be reaching out to the officer, his family, along with the responding officers that were on the scene. >> reporter: and you can see here live that police tape still encircles the house. we are expecting investigators to return at some point today to continue with their investigation into exactly what happened here last night. now, the names of those involved have not yet been released. police are still trying to notify some of the family members. reporting live in gaithersburg, megan mcgrath, news4. barbara, back to you. >> thank you, megan. right now, people in atlanta are being asked to stay home if possible. all of georgia is under a state of emergency right now. about an hour ago, the national guard started helping people pick up their cars that they had abandoned on the side of the highway on tuesday. the country's nilaescity was paralyzed after a winter storm dumped less than three inches of snow and sleet. the storm forced more than 10,000 students to sleep at school. mayor kasim reed told the "today" show this morning that the traffic nightmare was the result of not only bad weather but poor planning. >> we made an error in the way that we released our citizens. so the state made a judgment to release state employees, private businesses made their judgment, and i made the call, and aps made the call. >> police responded to nearly 800 car crashes at the height of the storm. fortunately, there were no major injuries. and here we are dealing with our coldest morning of the week. storm team4 meteorologist tom kierein joins us with our first forecast for midday today. tom? >> hey, barbara, good morning. what a dramatic change from this morning. right around dawn, our temperatures were near zero throughout much of our viewing area. must of west virginia, virginia, maryland, in the low single digits, even closer to washonnhe low to mid-single digits this morning. but look at the change. it has warmed up dramatically. we're well into the mid to upper 20s now. shenandoah valley, martinsburg got down to 2 below zero. it's warmed up 22 degrees there just in the last five hours or so. and temperatures, shenandoah valley, in the mid-20s. petersburg, west virginia, right now at 30 degrees. there, it got down to zero as well. even on the eastern shore, it got down to near zero in cambridge, about you now up to 28 degrees there. what a tremendous change with the sunshine that is coming down, and this gorgeous blue sky. storm team4 radar scanning the sky. no snow around the region. however, the radar may be picking up some rain on sunday. we'll look at that in detail, and a warmer pattern for the weekend, and maybe iciness next week. that is coming up in just a few minutes, barbara. >> all right, thank you, tom. news44's un yang has an update on a story we've been following since november. she's at the live desk. >> police in anne arundel county have arrested two sisters for a black friday assault at a victoria secret in annapolis mall. antonia ash, you see on the left-hand side of the screen, and ebony brooks, there on the right, both from clinton. they say the two assaulted a teenage girl at the store after midnight on black friday, november. and take a look at the cell phone video of the attack. it helped police track down the suspects. the video received over 130,000 hits on youtube. police also reviewed surveillance video from the mall and other stores. follow this story on nbcwashington.com. at the live desk, i'm un yang. barbara? >> thank you. today, a solemn day for the two people killed at the maryland mall shooting. columbia mall is getting ready to host a candlelight vigil for brianna benlolo and tyler johnson. the two worked at the mall's zumiez store where they were shot and killed on saturday. in days since, mourners have been paying tribute at a makeshift memorial. the vigil begins at 5:00 this evening. howard county police are giving us more information about the man believed to be the gunman. investigators uncovered darion aguilar's journal. they say he had written about the shooting beforehand and even apologized to his family. the 19-year-old talked about killing people but didn't specify who his target would be. he also reportedly wrote that he knew he needed a mental health professional, and that he was ready to die. police say that after aguilar finished shooting, he turned the gun on himself. d.c. mayor vincent gray says someone will be held accountable after a man died right across the street from a fire station. >> who in the world is going to punish somebody for having violated protocol, but you saved somebody's life in the process? i'm not buying that. >> 77-year-old medrick mills collapsed on rhode island avenue in northeast. his daughter called 911 and begged firefighters across the street for help. instead, she was told it was against procedure for them to respond. the fire department launched an investigation. some question if 911 dispatchers sent an ambulance to the wrong address. a brand-new study shows a road many of you travel every day is also one of the most dangerous in maryland. it's the beltway between georgia avenue and rockville pike in montgomery county. news4's darcy spencer joins us live in silver spring with more on a new study. darcy? >> reporter: good morning, barbara. you know, if you drive this section of the beltway, this comes as no surprise. there's a lot of crashes. take a look here. this is part of the beltway that we're talking about, and highway officials say the blame sits squarely with drivers and not the design of the road. janis drives his towncar for a living, so he knows firsthand it's bad out there on the beltway. >> texting. you know, it looks like they're not texting, but they're, like -- >> reporter: it's no surprise to him that this four-mile stretch from 495 in montgomery county, from georgia av few to rockville pike, is the busiest and averages 260 crashes a year. some of them fatal. >> the other guy you want to go to the right, the other one want to go to the left, but they don't see each other, so they're, like -- >> reporter: state highway administration officials say nearly all of those wrecks have one thing in common. driver error. many told us they have to pay extra attention, because other drivers are distracted and driving dangerously. >> cut off on the beltway all the time. a little bit that i do drive on the beltway from here to 270 north, i can't -- i can't tell you how many times i get cut off, people not looking, zooming and my quarterpanel probably would have been hit a hundred times now if i wasn't paying attention. >> reporter: most of the hundreds of crashes from 2008 to 2013 were rear-enders. highway officials say calls by motorists driving too fast, not paying attention, and smashing into each other are even the jersey barrier, and if it rains, a crash is a guaranteed. >> people are doing whatever they're doing, talking on the phone, if it's four, five cars on the road, someone not paying attention, you'll still have a crash. >> reporter: to give this a little bit of per expectfecspec considering the sheer volume of traffic along the roadway, 260 a year really isn't that bad. it's much safer than, say, on a secondary roadway. but this is a good reminder that you've got to pay attention when you're behind the wheel. reporting live from silver spring, darcy spencer, news4. >> thank you, darcy. this morning, police in arlington are investigating what caused a driver to lose control, smashing into a westwood college building. this was the scene last night just before 8:30 on fairfax road in arlington. the car went over the curb, through the bushes, and right into the front of a building. the driver was taken to the hospital. no word yet on that person's condition. and right now, republicans are meeting on the eastern shore of maryland. coming up, what the house speaker is now saying about the chance at immigration reform. plus, we're following a developing story in kentucky as many asinine people are dead in a house fire. 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[ girl ] make dinner pop! right now, deliberations are under way in amanda knox's murder retrial. the italian appeals court entered chambers after the last round of rebuttal by knox's defense team. knox is awaiting the verdict in her hometown of seattle. her co-defendant and ex-boyfriend is in court. this is the third trial in the murder of her roommate in 2007. knox and saul cito were convicted in the first trial, spent four years in prison and freed after an appellate trial. relief comes today to marylanders who had trouble buying health insurance through the state's online exchange. governor martin o'malley is signing emergency legislation allowing them to be insured through the maryland health insurance plan. it won't impact many people, though. the private insurers who are part of the online exchange agleed to offer coverage retroactive to the start of the year to anyone who expressed interest by last tuesday. and president obama's in wisconsin right now. he left joint base andrews earlier this morning. he's in wakesha near milwaukee to talk about ways to improve job opportunities. it's one of two stops he mentioned in his state of the union address. from wisconsin, he'll fly to nashville and speak at a high school about ways to help the long-term unemployed. house republicans are preparing to unveil their immigration reform plan. they haven't given any hints about what their legislation will include, but house speaker john boehner says it won't be a comprehensive bill like the one the senate passed last year. >> you know, it's one then to pass a law. it's another thing to have the confidence of the american people behind that law as you're passing it. that's why doing immigration reform in a common sense, step-by-step manner helps our members understand the bite-sized pieces that helps our constituents build more confidence that what we're doing makes sense. >> many conservatives worry that boehner's plan will create a way for undocumented immigrants to become u.s. citizens. for more on immigration reform and the republican meeting taking place on the eastern shore, we're joined by mark murray, nbc's senior political editor. good morning. >> good morning, barbara. >> this is a change of direction what we're hearing right now from speaker john boehner. it wasn't long ago that the house republicans blocked any kind of vote on immigration, right? >> it does seem they are moving on immigration, and there does appear to be almost a thaw a little bit, where house republicans realize we need to get some things done right now, and we can work with the president on some of the issues. immigration among them. the question is whether the rank and file ends up buying that. we know where house republican leaders john boehner are. there are some other house republicans who support immigration reform. a lot of the rank and file doesn't. that's why you're seeing john boehner talking careful tones about a step-by-step approach, a piecemeal approach, making sure people realize this isn't an automatic gateway for citizenship for undocumented immigrants. he has to walk a careful line. it will be interesting to see what comes out of retreat. >> do you think something will come out of the whole immigration discussion now? >> we're supposed to end up getting a framework from republicans. whether the framework translates into legislation that can be voted on and voted out of the house, that remains another matter. >> house from the house speaker, a list of four bills that are stalled in the senate that he says needs attention. let's start with those, starting with job training. >> there is legislation that eric cantor, the house majority leader, has put together a skills act. and, barbara, this was an entire letter the republicans said, you know be we can work with you, mr. president, after your state of the union address. i was talking about kind of a thaw, and this letter seems to be another suggestion in the thaw. and what republicans are going -- particularly as it comes to job training, is the situation in which the republicans say, hey, we passed our own job training program, you mentioned in the state of the union, why don't we come together and work. there does at least a magnanimous attitude. >> reacting to the polls you were talking about. let's talk about construction of natural gas pipelines. that's another issue. >> the republicans, the biggest thing they want is the approval of the keystone pipeline. president obama talked about all of the above on energy and the great energy expansion. this is one area republicans and -- where republicans want action from the president. >> we're just hearing now that the a.p. is saying that henry waxman is considering retiring, or will retire. do you know -- >> nbc can confirm that. our producers on capitol hill got that news as well, today. of course, henry waxman is a big lion of the house democrats. a democrat from california. we saw one of his colleagues, democrat george miller, also recently announce his retirement after serving for a very long time. these are going to be very safe democratic seats, but it does show you that some of the big democratic leaders that we heard from in the 1990s and in the 2000s are beginning to retire. >> because they're getting older or getting tired of trying to deal -- >> maybe a little bit of both, barbara. >> all right. thanks a lot. >> thank you. and for more from mark and the rest of the nbc news political team, check out "first read" on nbcnews.com. and tom's here now to talk a little bit about our weather. we did have a cold start, and it's still pretty chilly out there, tom. i ran out a minute ago. >> quickly warming up, though. you know, barbara, we had just enough snow on tuesday night, enough coating for any critters to leave tracks. maybe you saw tracks like this along your sidewalk. i think this might have been a fox maybe. >> looks like it, doesn't it in. >> looks like it could be. >> is that outside your door, tom? >> no, this was on my front porch. i went to sweep my front porch yesterday afternoon. >> maybe a platypus or -- [ laughter ] dinosaur duck. >> i think it is a dinosaur, or a little bird. but love your pictures that people were posting on twitter and facebook, too. the critters leaving the tracks in the light snow. and i was earlier this week visiting this school, the navy school in fairfax, virginia, and talked to 200 first and second graders there, filling the library there at the navy elementary school in fairfax. it's right off of west ox road and had a great time there. i want to thank teacher stephanie shams for the chance to talk to the terrific students at the navy elementary school in fairfax county, in fairfax, virginia. it was a lot of fun. what a great group of people. what a wonderful staff they have. look how cold it still is. below freezing. a lot better than it was this morning when we were near zero. right now around the metro area, much of prince george's county, mid-20s. mid and upper 20s in montgomery county, fairfax county. much of the rest of northern virginia climbing into the 20s. huntingtown still at 21. it got down to just 1 above there this morning. as well as in parts of the eastern shore, it was near zero. shenandoah valley, the mountains, temperatures are now climbing into the 20s. most of those locations, as well, with that bright sun and a blue sky, beginning to work its magic. these are highs, i'm anticipating, for this afternoon. ought to make it in the low, maybe briefly mid-30s around the metro area, but elsewhere farther north and west, highs in the 20s, near 30 degrees. we have a calm wind with this bright sun that's going to be with us here into the afternoon. then tonight, after we get our temperatures into the 30s, the temperatures should be dropping back down. there's the scale. i think we'll be back down to near 20 degrees by midnight. just a few clouds moving in during the evening hours, and they'll be with us off and on during the day on friday. tomorrow afternoon's high should make it warmer, into the low 40s, i'm anticipating, and then on saturday, even milder. should be making it into the upper 40s saturday afternoon. partly sunny. might have a little sun on sunday morning, and then sunday afternoon into sunday evening, there's a pretty good chance we're going to get sprinkles during the afternoon, quite a bit of cloudiness around, but near 50 degrees during the afternoon. then some of the sprinkled activity may change to wet snow before it ends on monday morning, and some sun back monday afternoon, and then maybe some icing moving in late tuesday night. we could get some freezing rain, some icy roads. temperatures holding steady, near 30 degrees tuesday night into wednesday morning. and then, i think on wednesday afternoon, we could get some rain warming up enough for it to change over to rain and highs in the 40s, and that's the way it's looking, barbara, up and down we go. a nice warming trend just in time for the weekend. boy, do we need it. everybody's getting sick and tired and tired and sick of this winter. >> this has been a busy winter for you. you have been working a lot, tom. >> sure has. >> thanks so much. we have some new information on what working too much can do to your health. coming up, we'll have that story. plus, from the weather to the food, we are getting you ready for super bowl. and whether or not your child will grow up and become overweight may be decided very early in their childhood. we have the results of a new study. first, here's a look at what's hot on nbcwashington.com. i'm at the live desk. this just in. the snowy owl that was recently spotted in the washington area was hit by a bus and is now in the care of the national zoo. this is video from last friday. the snowy owl was spotted by a lot of people in the area, create add lot of attention. now, these pictures are actually from the national zoo. these are veterinarians at the zoo right now caring for this snowy owl. d.c. police apparently found the owl near 15th and i streets northwest. they say it was hit by a bus, and then police officers took the owl to the national zoo. you can see the vets there caring for the owl, checking out the owl. apparently, it was alert and responsive. they say no obvious physical injuries, but obviously, the vets there will take a closer look and see if there are any serious injuries. now, standard protocol for the zoo when they're treating wild animals such as the snowy owl, they will take care of it, provide as much care as possible, and then release it back into the wild. we're not sure exactly what the condition of the snowy owl is right now. these are pictures from the fliker site. we'll bring you more as we have it. back to you. >> eun, thank you. kids may be at risk for obesity earlier than we thought. a new study suggests half of children who are obese by the eighth grade were already overweight when they started kindergarten. this means the window to prevent obesity may be much shorter, perhaps closing before your child even goes to school. the study followed more than 7,000 students through grade school. >>. >> and we're gathering new information on a developing story out of kentucky. as many as nine people have been killed in a house fire. coming up, what we know about the victims and what may have started this fire. plus, are we done with the dangerous cold weather? storm team4 meteorologist top kierein is back to tell us what we know about how long the weather will stay above freezing, we hope for a while. and the problems the extreme cold is causing on our i'm eun yang at the live desk. we're following a developing story out of kentucky right now. nine people, including eight children from the same family, are believed to be dead after a fire ripped through their home early this morning. that was video from chopper 4 there. this happened in greenville, kentucky, a rural part of the state. police say two parents and their nine children lived in that single-story home. and neighbors say the kids ranged in anyone from 4 to 15. they say one parent and one child escaped the fire and were flown to a hospital in nashville, tennessee. firefighters say the house was fully engulfed in flames when they arrived shortly after 2:00 a.m. no word on what caused the fire, but investigators say it does not appear to be suspicious. we'll bring you any new information right here on news4 and on nbcwashington.com. at the live desk, i'm eun yang. barbara? >> eun, thanks. now, two brothers in russia are in police custody for their role in two suicide bombings last month in volgograd that killed 34 people. the first happened in a train station, the second aboard a bus just a few days later. investigators say the two brothers helped the suicide attackers travel to volgograd for the attacks. they reportedly are from dagestan, which has become a center for islamic insurgency. the attacks raised questions about terror threats ahead of the sochi winter olympic games. also now, local university is taking a close look at how sochi is preparing to protect the winter games. george washington university's homeland security policy institute is hosting a panel discussion on the terrorist threats against the host city and what's being done to prevent an attack. former homeland security secretary tom ridge is taking part. if you're interested, the discussions started about 30 minutes ago at the marvin center on 21st century, at george washington university. athletes will begin moving into their homes away from home today in theost city in sochi. crews have been working up to the last minute to get rooms ready at the two olympic villages there. this is the first time athletes will be split into two villages. one in the so-called coastal cluster. the other in the mountain cluster. so far, delegations that have visited say that they are impressed by the size of the rooms and the modern facilities. the mountain cluster village will house more than 3,000 athletes and staff. and our own jim handly will land in sochi this morning. he'll be blogging behind the scenes and bringing you live reports on news4 today throughout the game. follow along on facebook. you can follow page by page, or on twitter at jimhandly. and while organizers of the olympics deal with security concerns half a world away, another big sporting event is getting its own special attention. news4's aaron gilchrist is here with the steps being taken to protect the super bowl and interesting numbers about america's biggest game. >> reporter: in just days, american also practically halt their lives for the nfl championship game, and that has security experts paying very close attention. a big concern this sunday, the number of people taking mass transit. about 30,000 people could be using buses and trains to get to metlife stadium. that has security experts looking at the recent attacks in russia for ideas on how to prevent an attack. the weather also a big concern here. the high on sunday expected to be about 38 degrees, but it could drop into the 20s by the time the game is over, and that would make this actually the coldest of the 48 super bowl games played so far. of course, half the fun on this coming sunday is going to be happening in your house very likely. take a look at some of the numbers here. more than 49 million cases of beer will be sold on sunday. by the time the game rolls around, 125 million pounds of america's favorite game-day food, chicken wings, will be sold. guacamole apparently very big on this super bowl sunday. it will take about 471 million avocados to feed all of your guests this sunday. and then, there are the pizza delivery guys, my friends. they'll be pretty busy, a 35% spike in the business they do on super bowl sunday. and apparently on monday, well, it's going to be pretty rough on your stomach. 7-eleven says they see a 20% jump in anti-acid purchases. to get ready for the game, just go to our website, nbcwashington.com. >> thanks, aaron. we'll check in now with tom kierein. he's gone outside, and on the storm team4 weather deck. what's it feeling like, tom? >> it's still cold, but it's not the nose-numbing cold we had this morning when we were down to the single digits to near zero. gorgeous blue sky with sparkling sunshine here now. and the temperatures are warming nicely. it is now into the upper 20s in washington. we're in the mid-20s elsewhere. and on the bay, the eastern shore, low to mid-20s, out on the mountains, many locations well in the 20s, low 30s a hour by hour, through the day, we'll have the sunshine and reaching low 30s around the metro area. and then overnight tonight, back down below freezing. down to near 20 by late evening and by dawn, holding steady near 20, starting off friday morning. during the day tomorrow afternoon, highs low 40s and partly sunny. partly sunny, upper 40s on saturday. you can actually wash your salt-encrusted car tomorrow and saturday and even sunday. there may be some rain sunday afternoon and evening, might end as wet snow monday morning, and then the next weather maker looks to be tuesday night. might get some icing from freezing rain. changing to rain on wednesday. barbara? >> all right, tom, thank you. in just a little while, you have the chance to talk one-on-one with the d.c. government about the snow-removal process. the district's department of public works is holding a live webchat at noon today. it comes on the heels of this week's latest round of winter weather. the department wants people to ask questions about how the city handles clearing the streets. that's happening on the department of publi works' website. the winter weather has us seeing snow and ice in places that we are not used to seeing it. we're used to seeing sand and sunshine. the cold has caused the waters off the eastern shore to freeze over, and icebreakers have been taking to the waters there, because people in the fishing industry just can't work when the waters are frozen like that. this means those people can't make any money. >> last year there was just one weekend of ice. the year before, no ice at all. it's been, like, four, maybe five years since we've had ice like this. >> just over the bay bridge, the ice on the water is as much as six inches thick. two maryland men are facing some serious charges this morning for threatening home depot employees with a taser. anne arundel police say tyrone freeman and rusten hobson loaded up a shopping cart with power tools and tried to walk out. when employees tried to stop them, the men pulled out a taser and sparked it at them. they were able to get away but were pulled over by police a short time later. both are charged with first and second-degree assault and theft. a third man in the car, antoine barron, was arrested for three other outstanding warrants. virginia's new texting law driving law is paying off apparently. the commonwealth recorded 725 convictions since the law took effect six months ago. the dmv says virtually every county had at least one violation with most of them happening in northern virginia. there were 168 texting while driving tickets issued in fairfax county. it's going to cost you 125 bucks for the first offense and $250 for all subsequent offenses. texting while driving. and now to a story you saw first on 4, major traffic changes coming to the district as developers get ready to transform the 3rd street tunnel. the first changes you'll see are shifting lanes on massachusetts avenue. eventually, the street tunnel will bve with four new office buildings and a residential building. just to create the framework of steel across the tunnel, it's going to cost $250 million. >> the highway -- this was always planned. and when they built the highway back in the '60s, the idea was that eventually it would be built over it. >> the work is expected to start in mid-march. it will take almost four years to complete. developers say there will be traffic issues, and they plan to keep the lanes open. but the speed will go down. now, this next story may not describe you, but i'm sure you know someone who never stops working. nbc's tom costello explains why working nonstop can hurt you in the long run. >> reporter: they call it the great american speed-up. so many of us today seem to be in overdrive. >> monday's going to be another long day -- >> reporter: case study, anne baldwin, owning a p.r. firm, and every day it seems it is a crisis. >> we're probably going to be working until 9:00. this isn't the candy business. everything is not always sweet. it's not 9:00 to 5 be cloo. it's monday through sunday, 24 hours a day. >> reporter: 35 years ago, americans worked eight to nine hours a day. then called it quits. home for dinner, weekends with the family. but in today's 24/7 world, many employees feel they can never escape the office. expected to answer phone calls and e-mails in the dead of night, on weekends, even while vacationing. technology reporter bob sullivan writes extensively about america's changing work habits. >> it took about 200 years for unions to get us a 40-hour work week, and it took smartphones five years to completely take them away. >> reporter: also gone, family meals, kids' sporting events, and simple down time. working so many more hours means americans now work almost five additional weeks each year than they did in 1979. 35% of americans now work on weekends, and we're sleeping less. according to the cdc, a third of adults now get six hours or less each night. those long hours and lack of sleep can land you in the e.r. a recent study found people who work 11 hours or more consistently are at a 67% greater risk of having a heart attack. dr. allen taylor is the chief of cardiology at the medstar heart institute. >> the data shows there's a third of heart disease related to stress, and that chronic overwork could be a doubling of your risk for heart disease. so it really does add up to implications for heart disease. >> how was your day? >> reporter: stress experts say it's never been more important to set limits, deciding when to turn off the e-mail and cell phone, to carve out personal and family time. >> hello? >> reporter: for some, the more work the better. >> the harder i work, the more fun i seem to have. >> reporter: but for many, finding that balance between work and life is also a matter of health. >> hello? >> reporter: tom costello, nbc news, washington. doctors are testing algilla. what's being added to people's diets. andetted@@ñ@dea?tted@@ñ@a?06 this morning, it's a wait-and-see game for former race driver michael schumacher. doctors in germany are slowly working to take him out of a medically induced coma. the formula one racing champ has been in the hospital since last month after hitting his head on a rock while skiing in the french alps. his manager says it could take some time before schumacher you might want to take a close look at your car insurance bill. a new report from insurancequotes.com says car insurance rates can vary from month to month. the study says that some of the sharpest price differences happen right here in d.c. and maryland. december's traditionally the cheapest month to buy