Good evening, as we come on the air this friday night, several developing stories. We begin with the giant weekend storm that will affect tens of millions. More than 70 records broken today. In tennessee alone, 18 people have died. In the northeast, theyre using drones to check on roofs. And a coast guard cutter breaking through the ice trying to get to a stranded ship. And horrific driving in kansas city. We begin with tom llamas on the cold already tonight. Tom . Reporter because of the record snowfall and dangerously low temperatures, here where boats are frozen to the dock the ice here rocksolid. An arctic blast shattering records in at least 70 cities from florida to michigan. Ive never seen it like this. Last year was bad, but this years definitely a lot worse. Reporter on lake erie, a cargo ship stuck miles from shore, food airlifted to the icebreakers trying to reach it a similar problem here in boston. You can see ehow much ice is in the water. Navigational buoys frozen over with ice now sinking. Many saying this is the worst theyve ever seen it. In somerville, massachusetts, the city using drones to patrol the roofs of city buildings. Trying toe prevent this. The roof collapsing, horses killed. 100 reports of vulnerable or collapsed buildings just this month. Thursday night we were on the front lines of dangerous ice removal in northern massachusetts. Thick ice rolling off the roof in boulders. If you dont take the snow off, its going to keep feeding the icicles. Reporter George Vasiliades is getting 180 calls a day. As the snow melts, the below zero temperatures turning it back to ice. And tonight, with more bad weather on the way, the mayor sending out inspectors letting people know its time to move the snow. Tom, thank you. Urgent warnings at this hour telling drivers not to take the storm lightly. And 911 calls of frost quakes. Matt gutman is in nashville. Reporter a new ice storm blowing in. The potential is there for the roads to be the most treacherous that they have been. Reporter tonight the colds toll rising to 18 in tennessee alone, most of them on the roads spawning wrecks across the countrys midsection, including these buses in arkansas, no injuries there. Beleaguered road crews gearing up in nashville. Theyre getting little to no sleep. Reporter creating these frozen fountains in the south. But its also creating a much more startling phenomenon. You heard an explosion . Yes, something went boom reporter 911 operators inundated with calls. Ice or frost quakes occur when water seeps into the ground. It freezes and then expands, cracking the earth and sometimes shaking it. Tonight, what folks here hope is one last bout with icy misery. Matt gutman abc news nashville. Lets get right to rob marciano. You have the line where its going to be most treacherous this weekend. Well, icing is going to be a huge issue. Nashville in the bullsyeye there. We push the snow north and east. Icy across parts of d. C. To new york and boston. All snow to start. But on sunday a big warmup. But not for long. Another cold coming in so maybe more flash freeze for monday morning. And breaking developments from the american sniper trial. The defense resting its case. And the injury will have to decide who they believe, as doctors talk about the accused killer. Seen here in iraq. The video from the back of the Police Cruiser. Was he aware of what he was doing or not . Ryan owens has the story. Reporter a battle of the doctors. Prosecutors resting their case after calling two experts, saying routh was not insane when he killed the american sniper chris kyle and chad littlefield. He did know what he was doing was wrong and he did it anyway. Testifies dr. Randall price, who spent a year and a half reviewing the case and more than ten hours interviewing routh. He says the fact the marine veteran led police on this high speed chase is clear evidence he knew hed committed a crime. And when routh was in the back of this Police Cruiser saying he might be insane. \he was setting the stage for a defense of, its not my fault. Price tells the jury. He says routh was a heavy drinker and marijuana smoker who was drunk and high when he shot the two men at this texas gun range. Thursday, the defense closed its case with a different doctor, a psychiatrist who says routh has schizophrenia and was so paranoid he thought they were pig assassins sent to execute him as part of pigs taking over the earth. Prosecutors say routh made up the pig story after watching too much tv in jail. They say hes a fan of seinfeld and the pig hunting reality show boss hog. The judge is hoping to have closing arguments monday morning. But tonight, he warned the jury theres an ice storm heading this way. So Mother Nature may have an objection. Next to the deadly infection at ucla medical center. Nearly 180 patients exposed. And the warning for hospitals across the country. Cecilia vega has the story. Reporter as an 18yearold victim of a superbug outbreak at this los angeles hospital fights for his life uclas Ronald Regan Medical Center says patients were exposed during a common medical procedure using an endoscope. There were two endoscopes that were used that had cre infection embedded in them. Reporter the potentially deadly superbug known as cre is so powerful it is resistant to antibiotics. Superbugs are most commonly spread in hospitals by contaminated equipment. But even simple physical contact, such as a nurse changing a bandage on a patient, can spread the infection. Since 2001, this superbug has made its way into all but three states. Ucla now says it followed manufacturer sterilization guidelines. The goal is to hold them accountable. And cecilia, just arriving here. Now, the fda warning for the country. Theres so much on the line. 23,000 deaths every year 60 just from cre alone. The company that makes the scopes telling us its working to address the concerns. Thank you. Another breaking headline tonight. This one involves the showdown over immigration. We reported on a texas judge blocking president obamas executive order that would have allowed undocumented immigrants to stay here. Lets go to jonathan karl. The president planning to take action right away . Right. Theyre planning to use every legal tool it can to get this back ontrack. They plan to go to court to try to get an emergency order to allow work permits and other protections for the undocumented immigrants. Ive got to tell you, Senior AdministrationOfficials Say this will be an uphill battle. Thanks. Around the world to an urgent search for three missing schoolgirls, believed to have packed up and headed to join isis. The three friends, now believed to be in turkey and on their way. Brian ross on the straighta students, and authorities warning that american girls are being lured, too. Ross reporter the three school girls being urgently sought tonight left london on tuesday. Seen in this airport surveillance photo, with duffel bags in hand as if they were off on a holiday break. Instead, says scotland yard, they headed off to join the worlds most brutal terror group in syria. Were concerned that these three girls, if they were to get into syria, would be in grave danger. Reporter all three, ages 15 and 16, were straight a students at an elite coed academy in east london. The two young women identified by name by scotland yard, Shamima Begum and Kadiz Sultana were friends with yet another girl from the same school who went to join isis in december. We believe theyre extremely vulnerable, were appealing to them directly. Reporter but it is the appeal from isis propaganda that for now seems to have the stronger pull, with hundreds of young women from europe and the u. S. Answering the terror groups call, which taps into a mix of emotions. Feelings of alienation, feelings of inequality. Adventure in some cases, romance. Reporter in the u. S. , 19yearold Shannon Conley of denver, now serving a fouryear prison sentence, fell in love over the internet with an isis fighter. British authorities and the distraught parents tonight are using social media to try to reach the three british girls, still believed to be in turkey and not yet across the border into syria. And isis lands. Top students as you report. Thank you. Now to an abc news exclusive, for the first time the surveillance images of a daring rescue. Pierre thomas has the story. Reporter youre watching neverbeforeseen video of teenage kidnapping victim Hannah Anderson and her dramatic rescue by fbi agents in idaho. Watch the infrared images again as two agents rush in, grabbing hannah by the hand, all caught on surveillance camera secretly recording from a plane thousands of feet above. The desperate search began in this inferno a thousand miles away where the fbi believes oncetrusted family friend James Dimaggio killed hannahs mother christina and 8yearold brother, ethan. Im begging you to let my daughter go. Youve taken everything else. Reporter the search for hannah culminating in august 2013 in this video exclusively obtained by abc news. Unaware hes being watched, dimaggio relaxes, taking off his shirt, later washing in the lake. And theres something else. Hannah is waving, possibly signaling the plane. She keeps waving while dimaggio has his back turned. The Fbi Hostage Rescue Team believes hes armed. These exclusive photos from the campsite show a rifle, handgun, machete and handcuffs. Theres no turning back. Reporter it was getting dark. The Hostage Recovery Team is in position and they move in confronting dimaggio and grabbing hannah. We hear shots fired and we heard one down hard and jackpot. So we knew hannah was okay. Reporter dimaggio was killed. Hannah plans to become a detective. And a judge is determining whether two 12yearold girls should be convicted. The interrogation tapes, released. Its a snowy night in wisconsin, where this entire community was stunned all over again. Hearing from two girls in their own voices about how they allegedly lured their friend into the woods and stabbed her. Listen. She was my only friend for a long time. Why would you hurt your only friend . It was necessary. Reporter and we also hear from the other 12yearold. I said im scared i was told i was told if i didnt do something, my family would be in danger. Reporter who or what were they scarred of . Slenderman a fictional character on the internet. Have you ever met him . Not exactly. Tell me about him. He watches you. Reporter her mother knowing payton crawled out of the woods. Stunned. Police say morgan said it was weird i didnt feel remorse. Yeah. Reporter this was a girl that had been in your home many many times. That line it was weird that i didnt feel remorse. I thought she really cared about her as a person and they were good friends. Reporter later tonight, out of the woods, the interrogation tapes on 20 20 at 10 00 p. M. Eastern, right here. In the meantime still much more to come. The new headline about the nascar star and his exwife just coming in. And road rage mystery. New details. And Robin Roberts with Neil Patrick Harris. The big reveal about magic, and hugh jackman is here with advice. announcer ask your doctor about linzess a oncedaily capsule for adults with ibs with constipation or chronic idiopathic constipation. Linzess is thought to help calm painsensing nerves and accelerate bowel movements. It helps you proactively manage your symptoms. 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The justreleased Police Report showing that after an aggressive driving encounter with two men in a sedan, tammy meyers dropped off her daughter whom shed been teaching to drive in this parking lot, and her son brandon jumped into the car with her, armed with a gun. They spot the sedan, at which point brandon says the passenger in the vehicle opens fire. They drive home, the sedan follows. According to the report, brandon gets out. Theres a gunfight, with mom staying in the car. But then she comes out of the car, and thats when the dude sees my mom and just, whack. Right into her head. Reporter meyers dies two days later. Police spend a week searching for a suspect. This is the meyers live. This pink house over there thats eric nowschs home. The suspect taken into custody yesterday after a tense standoff. Turns out the meyers knew eric nowsch. Police tonight searching for his alleged accomplice. Kendis gibson, abc news, las vegas. 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Oh, yeah im going to try and do something better, i think. Reporter but neil reveals more than trying to beat the selfie challenge. Number one timing is everything. You dont want to just tell a bunch of jokes at the wrong time. They wont be well received. Reporter what you may not know about Neil Patrick Harris is that he loves magic. So, number two expect the unexpected. Theres got to be some magical moments. Yeah. We have a bunch of magic stuff planned. Reporter number three get those names right. The one and only adele dazeem. Reporter benedict cumberbatch. You said it wrong. Theres a t at the end of his first name. Reporter please. Benedict cumberbatch. Reporter one last piece of advice from former host hugh jackman, who sent us this video message to his friend. Reporter from steve martin, first 45 minutes are the best audience youll ever have in your life, and from 45 minutes on the room is filling up with losers. So just hurry up and get to the end. Thats all i have for you, man. Have a great great night. Youll be awesome. H this is jeopardy please welcome todays contestants a highschool spanish teacher from louisville, kentucky. A stayathome mom from arnold, missouri. And our returning champion a Library Associate from washington, d. C