good evening. it's great to have you with us here on a wednesday night. we begin with the urgent search outside chicago. at least 100 investigators now moving in, staking out rooftops. the search growing for three suspects. the images of the all out hunt these past 24 hours, helicopters searching by air. now they fear the suspects might have slipped away. after an officer, a 32-year veteran, a father of four was killed in cold blood. his nickname was g.i. joe. moments ago, that chilling new clue of the fallen officer's final call. abc's gio benitez outside chicago tonight. >> reporter: tonight the three suspects in the shooting of police lieutenant joe gliniewicz still at large. new audio obtained by wls appears to capture gliniewicz's last call from this isolated back road. >> i'm out near the cold concrete plant. >> reporter: it all started just before 8:00 a.m. tuesday. lieutenant gliniewicz reported seeing the three suspicious men. gliniewicz says he is pursuing them on foot into a swamp area and moments later calls for back-up. >> 10-4, did you need a second unit? >> yeah, go ahead and start somebody. >> reporter: two back-up units arrived and about ten minutes later, they find lieutenant gliniewicz on the ground with a gunshot wound. the shooting launching this massive manhunt from the air and from the ground. canine units and s.w.a.t. teams. investigators are now turning to the evidence. in fact, right here at the crime scene you can see them searching for any clues. the lead investigator saying they will turn over every leaf in this desolate swampy area. tonight the widow of the fallen father of four speaking out for the first time at a vigil for her husband. >> joe was my best friend, my world, my hero, the love of my life for the last 26 and a half years. >> reporter: an emotional message as authorities warn residents to be aware of anything. >> shot a police officer. i think that speaks for itself. extremely dangerous. >> gio is with us live outside of chicago. word they're studying any kind of surveillance video they can get their hands on? >> reporter: that's right, david. they want to see if they could see the men before the crime or after the crime. they have video right now, but we're told they haven't been able to spot those men anywhere on those recordings. a challenge ahead, david. >> gio benitez with us live tonight. thank you. we also have a major development this evening in that case out of san antonio. the man, his hands in the air, but the view partially blocked there by a pole. two sheriff's deputies opening fire. he would later die. tonight word of a second video and authorities say it could reveal a crucial clue about what really happened. abc's matt gutman from texas. >> reporter: in that instant before he was fatally shot friday, was there something in gilbert flores' left hand. that cell phone video at the heart of this case showing flores's hands up but his left hand is blocked by that pole. tonight a second video is being examined but authorities are not releasing it. >> we believe that mr. flores had a knife in his hand. >> reporter: in that first video seconds after the shooting, the officer on the right seems to kick something away. was it a knife? >> the male that called it in assaulted his wife and child. >> reporter: flores seemingly running amok. >> he's trying to get into a patrol vehicle. he's threatening suicide by cop. >> reporter: before it all ended. >> suspect down at this time. additional shots fired. >> reporter: down but not dead. it all could have been so much clearer had the deputies had one of these, a body camera. county officials voted overnight to buy more of these. meanwhile, the d.a. is telling us that all charges are on the table including murder. david? >> matt gutman in texas tonight. thank you, matt. we're going to turn to baltimore and to the highly charged case of freddie gray who died last april, his spine nearly severed after he was arrested and put into the back of that police van. six officers charged in his death and tonight a judge refusing to dismiss the charges. outside the court today dozens of protestors facing off with police. one person was arrested. we turn now to the race for 2016, the war of words tonight between jeb bush and donald trump. jeb bush taking on trump in the last 24 hours in two languages. tonight trump saying jeb bush should be speaking english, not spanish. here's abc's jon karl. >> reporter: after jeb bush hit donald trump in english and in spanish -- [ speaking spanish ] >> reporter: trump today slammed bush for speaking spanish, telling the conservative breitbart.com, he's a nice man, but he should really set the example by speaking english while in the united states. spaling by the way is the native language of jeb bush's wife columba and more than 37 million other americans. bush's campaign manager, danny diaz, tweeted, donald trump against spanish, says reagan is not a conservative? looks like a one-man mission to kill the g.o.p. he tweeted this video using trump's own words against him. >> hillary clinton i think is a terrific woman. i'm a little biased. i've known her for years. >> reporter: in no time, a trump video using jeb's own words. >> we recognize the commitment of someone who has devoted her life to public service. i want to say thank you to both secretary clinton and to president clinton. >> jon karl with us live from the white house. word tonight jeb bush's son now jumping into this back and forth? >> reporter: that's right. jeb bush jr. jumping in via twitter, tweeting, quote, just to state the obvious, can't wait for this summer reality tv show to be over. david? >> jon karl with us again. thanks as always. former florida governor jeb bush on "good morning america" first thing tomorrow morning right here. in the meantime, speculation growing tonight, will vice-president joe biden jump into the race, challenging hillary clinton for the nomination. many eyes watching the vice-president today speaking in the key state of florida. biden and hillary clinton for a long time on the same team in the white house. abc's cecilia vega on the possible clue tonight. >> reporter: today in this key battle ground, did joe biden drop a hint? >> people who aren't willing to risk failing never succeed. >> reporter: the vice-president looking a lot like a candidate during his first road trip since he began quietly exploring a possible 2016 bid. behind the scenes, biden land is heating up, his supporters hiring staff. one source close to him telling abc news it now seems more likely than not that biden will run. challenging not just a political ally but a friend. biden and hillary clinton working side by side for years. just last week the democratic front-runner, offering nothing but praise. >> i have a great deal of admiration and affection for him. >> reporter: will he or won't he? it's a decision that may not come until the end of the month. >> that source close to biden telling abc news it's more likely than not that he'll run? >> surprising words. one of the things weighing heavily in this decision is the recent death of his son beau in may. biden telling supporters his heart and his soul has to be in it and he says right now he is pretty banged up. david? >> cecilia vega with us. great to have you. a big victory for president obama tonight. his nuclear deal with iran under fire from republicans threatening to defeat it. tonight the president's deal is safe thanks to senator barbara mikulski of maryland, saying she will now support the deal. giving the president 34 votes, the magic number, enough to prevent the senate from overriding president obama if he should veto a republican resolution blocking the deal. we turn now to that showdown in kentucky. the county clerk defying the supreme court, denying same sex couples marriage licenses. she returned to work today with an armed escort and turning down yet another gay couple. we know some of those couples documenting their encounters with the woman who insists she is following god's authority, not the supreme court's. abc's alex perez on what that county clerk is now asking for. >> reporter: county clerk kim davis defiant today, her husband at her side, armed with a handgun tucked in his waist band. waiting for her inside, another gay couple looking for a marriage license. >> your interpretation of the bible does not trump the constitution. >> amen! >> our constitution was founded on faith. by the word of god. >> reporter: davis today asking a federal judge to allow her to deny marriage licenses to same sex couples while her case makes its way through the courts. the controversial clerk catapulted to the spotlight in july with this cell phone video. david moore and david ermold arriving for a marriage license. >> if i can mention, i have the letter from the governor's office stating that all the county clerks are to issue marriage licenses. i also have the supreme court ruling. >> reporter: davis turning them away. they tried again in august and again yesterday. same result. >> when you heard her say she's working under god's authority, what did you think? >> you are not in the church. i respect religion. i respect people, people's faith, but this is a civil institution. >> reporter: but in this small town of about 6900 people, kim davis has her supporters, too. >> i'm standing behind her because i believe she is right. she's following god's law and i believe that trumps all. >> reporter: david, the u.s. attorney here tonight saying it's time for davis to follow the law. tomorrow a judge could decide if she will be held in contempt of court. david? >> alex perez tonight. alex, thank you. we turn overseas tonight and to a growing humanitarian crises we've been reporting on here. families, parents and their children trying to reach safety and a better life. from turkey tonight, this image of a little boy. it's difficult to see the man carrying his body. a refugee from syria, he died crossing the mediterranean, his family trying to get to europe. abc's chief foreign correspondent terry moran reporting in from the region tonight on the smugglers and what they're charging every one of those family members for a journey they might not survive. >> reporter: the children's corpses washed ashore overnight. police gently carried them off the beaches in the morning. officials say two overcrowded boats crossing from turkey to the greek island of kos capsized, at least 11 dead. another shocking tragedy in this deepening crisis, this exodus. at least 350,000 people have fled war, terror and poverty entering into europe illegally this year. and more than 2,300 have died at sea trying to get there. fahad is trying, too. he's ten months old. we met him and his family in izmir, turkey, as they prepared to risk everything in a smuggler's boat to greece. they're syrian, fleeing the chaos there. we learn that smugglers charge $1100 for adults, half price for kids. we saw how local merchants turn a grim profit, too. >> look at this. this is not a life-saving device. this is for a little child. the store owner didn't want us around after that. every night for a week, fahad and his family go to the beach, hoping to get out. finally they do. their cellphone videos showing the overcrowded rubber boat, the fear on the childrens' faces. we take the ferry to greece, and find them safe and sound. the lucky ones. >> bye-bye little boy. >> reporter: terry moran, abc news, on the island of kos, greece. >> terry, thank you. we're going to turn now to pope francis tonight on the eve of his visit to america. a new poll showing american catholics growing more accepting of nontraditional families. nine in ten u.s. catholics say a household headed by a married mother and father is an ideal situation for bringing up children. 48% believe children raised by unmarried parents living together is as good as any other arrangement. 43% now believe children raised by gay or lesbian couples is now acceptable and as good as those arrangements. the new and evolving numbers come the same week as our exclusive with pope francis at the vatican. the pope telling us he is ready for his visit to the u.s. as he took questions with us from three different cities. the pope and the people, our papal audience with americans asking questions and sharing their stories of struggle friday night at 10:00 right here on abc. we turn to the extreme weather we're tracking this evening. a hurricane and a tropical storm churning in the pacific this hour. also tonight the extreme temperatures up and down the east coast. tomorrow what should be the fifth day of a heat wave in philly in new york. ginger zee telling us the heat wave expected to break on friday. that extreme heat hitting as millions of children go back to school. tonight here, an abc news exclusive, a school tragedy averted just days into the school year. you might remember these images last week. children evacuating that high school in west virginia. inside a student holding a gun, threatening to kill others and himself. tonight the teachers hailed as heros, revealing how they helped talk him down. here's abc's t.j. holmes. >> reporter: it was just nine days into the new school year and phillip barbour high school in phillipi, west virginia goes on lockdown. >> we have a hostage situation. second floor, hostage situation, barricade. >> reporter: the hostages according to police, twila smith and her class of 27 students. the hostage taker, a freshman who walked in and put a gun to smith's head. >> he said that he was going to kill people and himself. >> what were you in there talking to him about? >> i just kept asking him to let everybody leave and he and i would stay. anything i could think of, just telling him that he hadn't gone too far. >> reporter: when the bell rang for the next class to come in, other students began knocking on the door but smith turned them back and was able to signal another teacher, jen swift. >> he was standing by the bulletin board with the gun raised towards my head and said you can get in here, too. >> reporter: swift ran for help. police and the boy's pastor eventually get him to surrender. smith now credited with keeping her students alive. >> when they walk in here, we're supposed to teach them and we're supposed to take care of them. >> reporter: for these two teachers, job well done. t.j. holmes, abc news, phillipi, west virginia. >> incredible bravery from teachers yet again. there's still much more ahead on "world news tonight" this wednesday. we want your opinion on the new debate. who is responsible, the doctor or the patient after a doctor is charged with murder, accused of killing patients who overdosed on prescription drugs, the trial that could impact doctors and their patient's prescriptions across this country. also tonight the case of the construction worker and the construction site, warned to get out of the manhole. just incredible, the explosion seconds later, how he survived. look at this tonight, the tour group on safari and the elephant charging their truck. close call coming up. try phillips' fiber good gummies plus energy support. it's a new fiber supplement that helps support regularity and includes b vitamins to help convert food to energy. mmmmm, these are good! nice work, phillips! the tasty side of fiber, from phillips'. ♪ mother nature can turn in an instant; don't turn back. introducing the new 2016 ford explorer. be unstoppable. ♪ this is my fight song... next tonight here, the landmark trail in california, the doctor charged with murder, accused of killing three patients who overdosed on painkillers she prescribed. abc's mara schiavocampo on a case that could set a precedent for doctors and what they prescribe for patients. >> reporter: tonight a california doctor accused of killing patients with prescriptions. dr. lisa tseng facing second degree murder charges in the overdose deaths of three patients after prosecutors say she ignored several warnings, including the overdose deaths of 12 patients overall and continued prescribing powerful painkillers like oxycontin. >> during this period of time the defendant's practice of prescribing did not change at all. >> reporter: three pharmacists testifying they even reported their concerns to authorities. >> the strengths were high and the quantities were large. >> reporter: defense attorneys say tseng is not guilty and her patients are ultimately responsible for their own behavior. >> they took excessive dosages. in some instances, they mixed alcohol. they mixed other drugs. >> reporter: now the patients' families hope cases like this one can help save others. >> i don't want anybody else to lose their lives because of irresponsible prescribing. >> reporter: legal experts say this case could have an effect on doctors' prescribing practices moving forward. if convicted on all counts, tseng faces 45 years to life in prison. david. >> mara, thank you. when we come back here tonight, the worker warned to clear out moments before a powerful blast. that case back in the news tonight, just incredible. also tina fey and amy poehler got laughs hosting the golden globes. the surprise now coming for the oscars. two hosts. any guesses? >> and then a reminder of what's coming friday night. in study after study, advil is unsurpassed in pain relief. nothing is proven stronger on aches and pains than advil. not tylenol. not aleve. nothing. relief doesn't get any better than this. advil. so you're a small business expert from at&t? yeah, give me a problem and i've got the solution. well, we have 30 years of customer records. our cloud can keep them safe and accessible anywhere. my drivers don't have time to fill out forms. tablets. keep it all digital. we're looking to double our deliveries. our fleet apps will find the fastest route. oh, and your boysenberry apple scones smell about done. ahh, you're good. i like to bake. add new business services with at&t and get up to $500 in total savings. every auto insurance policy has a number. but not every insurance company understands the life behind it. those who have served our nation. have earned the very best service in return. ♪ usaa. we know what it means to serve. get an auto insurance quote and see why 92% of our members plan to stay for life. to the index, a battle heating up between a california county and a contractor. video showing the worker in a manhole warned to get out. seconds later that powerful steam explosion. crew members rushing to save him. he was unhurt. the county says that site was unsafe. a white knuckle moment for tourists in zimbabwe. an elephant charging here, spinning their truck, nearly flipping it. no one was hurt. just incredible. the oscars getting two hosts next year but who? some guesses, matt damon and ben affleck. perhaps key and peele from comedy central. they would certainly make us laugh. another guess, poehler and fey? they already made us laugh. we will see. the answer coming soon. when we come back tonight, the incredible gift given by a teacher. you have to see this. ♪ so jill, i know the markets have taken a hit lately. mm hmm. just wanted to touch base. how did edward jones come to manage over $800 billion dollars in assets? huh. okay. here's our latest market outlook. two things that i'd like to point out... through face time when you really need it. so that's interesting, you know we had spoken about that before. it's how edward jones makes sense of investing. we've gotpeptocopter! ummy town. ♪ when cold cuts give your belly thunder, pink relief is the first responder, so you can be a business boy wonder! ♪ fix stomach trouble fast with pepto. watching fis great...ether ...but i think women would agree... ...huddling with their man after the game is nice too. the thing is, about half of men over 40 have some degree of erectile dysfunction. well, viagra helps guys with ed get and keep an erection. ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. side effects include headache, flushing, upset stomach and abnormal vision. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. stop taking viagra and call your doctor right away if you experience a sudden decrease or loss in vision or hearing. ask your doctor about viagra. now available in new single packs. ...of fixodent plus adhesives. they help your denture hold strong more like natural teeth. and you can eat even tough food. fixodent. strong more like natural teeth. fixodent and forget it. it's the brand more doctorsose recommend for minor arthritis pain. plus, just two aleve can last all day. you'd need 6 tylenol arthritis to do that. aleve. all day strong. finall finally tonight here, "america strong," a teacher you met right here and her gift. >> reporter: perhaps you remember the sign we showed you outside mrs. painter's class, improving the world one child at a time. inside that window, she's doing just that. one of her first graders at the time, 6-year-old matthew parker, only getting to school twice a week. >> what's two plus one? >> reporter: he needed a kidney transplant. his first didn't work. >> you've heard so many times people say it would be like a needle in a haystack. >> when i went in to be tested they kind of prepared me for the fact that i most likely would not be a match. >> reporter: but she was. hand in hand in that school hallway she was about to take the journey together with matthew. >> we love doing stories on teachers. we think they're the unsung heros in america, but you really are going above and beyond the call. >> well, i guess i am. but i'm happy to do it. >> reporter: happy to do it. and with the new school year starting, just look at who got off the school bus today. matthew, back to school and back on track. in second grade now but thanking that first grade teacher who taught us all a lesson about what it's like to give. >> love seeing matthew. way to go, mrs. painter. we'll see you right back here tomorrow night. >>. tonight, evidence of a east bay burglary. and the last oakland bart shooting. who pulled the trigger? a north bay casino breaks ground. tonight, hundreds of calls police have responded there. and new technology for the doctors office. the blue tooth invention of three uc berkeley students making medical history. we're going to begin with a firsthand account from a victim of a kubl home invasion robbery. >> the cell phone left at the crime scene has been a crucial part of evidence in the gone girl kidnapping case but may have to be thrown out. >> melanie is here to explain why. >> reporter: we've heard from the victim in that home invasion case. he testified and described waking up to a man dressed in black, shining a flashlight and making demands. the man who lives in this home, testified the robber woke him up and said your daughter is okay. listen to what i say. he said the robber tried to tie him up, but he fought back. the robber, he says, hit his head with the flashlight. he says his wife ran to the bathroom to call 911. the victim says the robber left the home when yelling for his wife to get the gun. though they didn't have one. matthew muller was identified by his cell phone. detectives bypassed the locked phone by calling 911, got the number, and that the phone was registered to muller's parents. evidence his attorney wants thrown out. >> if you want to search something with a warrant, have you to make that clean. >> reporter: if they believe there was an urgent need for the evidence without a warrant, the even