country. six banks, five states on the move already. good evening and we begin tonight with flight 370, the major new clue was it deliberately brought down. all of this comes one year four months after that plane vanished with 239 on board. the new clues from that piece of a wing discovered on a remote island a number etched on the side. tonight authorities telling abc news it matches a boeing 777. we know there's only one missing in the world, and the angle of that flap a clue about how the jet may have gone down. also tonight, the suitcase watching up too. abc's jim avila leading us off. >> reporter: helicopters today are searching the shores of reunion island. tonight, a battered suitcase found on a beach. no clues yet about its origin. while on shore, local police load the sea-worn, but crucial wing part into an evidence van and strap it in. the first leg of a long trip to france tomorrow, where investigators tell abc news they will start the critical csi work on the floating debris. >> the important thing is to make sure it's clearly identified as a 777 part. >> reporter: a reliable u.s. government source tells abc news boeing engineers have indeed seen this number 657bb on the debris and the matches a 777. the critical part called a flaperon. >> the flaperon is in this area of the wing. >> reporter: it helps the plane turn and is also used to slow the plane down for landing. experts say it looks like the flap was extended, leading them to the initial conclusion that mh370 may not have been in a steep dive when it disappeared. >> what i don't see is a severe nose-down impact. it looks like it's a little bit higher than that and that the flaps were deployed, which would be normal if you were trying to fly the airplane slowly. >> so, if you're trying to land it? >> possibly, you're trying to land or ditch the airplane. >> reporter: even though the distance to the australian coast where searchers have been focused is 2,600 miles, it is possible that plane debris would float all that way. but drift patterns are not precise enough to dramatically narrow the search. >> a piece of wing on reunion island, it's very hard to trace back to exactly where it crashed. >> if you mean exactly within ten miles, even 100 miles, you're right, but to say it generally came from the eastern indian ocean is definitely possible. >> reporter: marine biologists will take a hard look at the sea life, from the age and type of barnacles to microorganisms for clues. >> may be able to identify specific species that have been growing and identify those that are warm water or cold water. >> reporter: u.s. intelligence authorities believe this crash was likely a deliberate act by someone in the cockpit and not an accident. it's a conclusion the initial clues today seem to point to as well. but intelligence officials are making it clear that this is an assessment and not a conclusion by them. that conclusion will be made by foreign authorities from france and australia. >> jim avila leading us off tonight. i want to bring in retired colonel steve ganyard, a pilot himself. i want to take our viewers back to that piece of wing because the angle of that flap and how intact the debris is as you heard jim reporting, leading someone to believe that someone might have deliberately done this. what do you think tonight? >> i think you're right. there are two scenarios. everybody was unconscious, the airplane went in at a very steep angle. what we're seeing here on this debris is something that's intact which opens the very chilling possibility that there was somebody alive, conscious, and trying to land that airplane after it ran out of gas. >> steve, when you hear that that number has been linked to a boeing jet and there's only one 777 missing, do you have any doubt tonight? >> i don't have any doubt, david. the problem is that this piece on the other side of the indian ocean is not going to tell us where the rest of the wreckage is on the bottom of the indian ocean, where that black box is and it will not bring us any closer to solving those mystery mysteries mysteries. >> steve, thank you. we turn to two scarce tonight. the plane at the gate in dallas when passengers spotted flames through the window. smoke filling the cabin, emergency slides deployed. abc's clayton sandell on that flight and the other causing concern today, too. >> reporter: the american airlines flight from dallas to chicago was ready for takeoff. then, trouble. possible smoke in the cabin forcing 146 passengers and crew down emergency slides. american says three people were hurt. the md-80 jet is an older model, and american is currently phasing them out. >> that's not good. >> reporter: dallas airport firefighters had a busy day. >> 1-7 center cleared to land spirit 407. >> reporter: also responding to a spirit airlines flight that touched down from orlando. a landing gear tire in flames. >> asked us to put our blinds down to keep the plane cool for the next takeoff. >> reporter: david, luckily no one injured in that fire. both of those incidents are under investigation. major developments in the police shooting in cincinnati the driver shot and killed during a routine traffic stop. tonight that officer behind bars pleading not guilty. he says he was nearly run over but the body cam telling a different story, authorities say, and within minutes gunshots. tonight, right here we have new video from the moments right after. just as we learn two more officers have now been put on leave. abc's tom llamas in ohio. >> reporter: today, stripped of his uniform, his badge, and now in stripes, former university of cincinnati officer ray tensing marched before a judge. >> do you understand you've been charged with one count of murder and one count of voluntary manslaughter? >> yes, your honor. >> reporter: tensing pleading not guilty to charges he murdered 43-year-old sam dubose. cheers in court as the judge set his bail. >> the bond will be $1 million any way. >> reporter: and tonight, new details about the minor traffic stop that turned deadly. >> hey, how's it going, man? >> hey, how's it going? >> reporter: just two minutes later. >> but i didn't even do nothing. >> go ahead and take your seatbelt off. stop! ( gunshot ) >> reporter: after tensing fires, another officer's body cam showing him on the ground. but he gets up and chases the car which rolls 100 yards before crashing. new video shows tensing looking in the driver's seat. shutting off the ignition. moments later he radios in. >> i almost got ran over by the car. he took off on me. i discharged one round. >> reporter: tensing then telling an officer on the scene. >> he was dragging me. i thought i was going to get run over. >> reporter: the prosecutor says that body cam tape tells a very different story. >> this is, without a doubt, a murder. >> reporter: tonight, tensing's attorney insisting the cop feared for his life. >> he thought he'd be sucked under that car and run over as he was pulling away from him. >> reporter: tensing has been a police officer for four years. documents obtained by abc news show that in his officer candidate questionnaire, he was asked, "how do you react to feelings of fear and danger?" his answer, "take a step back and not react quickly." officer safety number one rule. david, tonight we're learning that the first two university police officers who responded here to the crash site after the shooting have been put on paid administrative leave as a result of the university's internal investigation. david? >> tom, thank you. we also have chilling new images tonight from that movie theatre massacre in lafayette, louisiana. the suspected gunman buying a ticket there calmly walking to the movie theatre and 20 minutes later would open fire. tonight for the first time we hear the frantic 911 calls and here's abc's ryan owens. >> reporter: a chilling glimpse tonight at a killer who looks so calm. surveillance video just released shows john rusty houser buying a ticket, walking past the concession stand and down the hall to theater 14. where minutes later, the 59-year-old drifter kills these two women and shoots nine more. >> we were in the movies and someone just started shooting people. >> reporter: within seconds, movie-goers call 911. tonight, we hear their panicked calls for the very first time. >> 911, what are you reporting? >> there's a shooting at grand 16! >> how many shots you heard? >> like six or seven. he shot right at people. >> he was shooting at people? >> yes! >> reporter: police speed to the scene, and word it may be worse than those first callers thought. >> he has reloaded. he has a weapon. we have an active shooter here. >> reporter: one of those shot was teacher jena meaux, who was speaking to her church wednesday night and recalling how she jumped in front of her fellow teacher ali martin, taking a bullet in her leg to protect her friend. >> as i crawled i was praying, because i really thought he was gonna shoot me in the back of the head as i crawled on the ground. >> reporter: police still have no clue why hauser who had a history of mental illness walked into that theatre hell-bent on mass murder. >> ryan thank you. we turn now to the dangerous heat, 11 states with heat warnings and advisories again tonight. some relief though in the east. powerful storms slamming new york city sheets of rain across much of the northeast. this image from bay side queens tonight. a tree and a telephone pole uprooted. let's get right to rob. the relief in parts of the country welcome. >> it's a cold front but not much cooler behind it but drier. here's a line of storms that's done damage from d.c. to new orleans. the cold front does push all the way to atlanta and that's good news. out west monsoon humid out there, flash flood watches for mexico and southern california. north of that drier and hotter a third of it extreme drought. seattle, the 10th day of 90-plus heat. that's unprecedented. that's not good news for the fires. >> thinking of everyone in the west rob. that triple digit heat, fires in ten states tonight including this one in lake county california. firefighters battling the wall of flames 8,000 acres burned hundreds of homes evacuated. the natural guard sending a fleet of helicopters to help. that american dentist who sparked global outrage tonight facing a new investigation and the question could he be extradited. here's abc's david wright. >> reporter: today the outrage for this minnesota dentist for killing sesil the lion made it all the way to the white house, this petition calling to extradite walter palmer. >> there will be a forthcoming white house response. >> reporter: today the u.s. fish and wildlife service is launching its own investigation. officials say they've made repeated attempts to reach him. he's not at his office in minnesota or at his home or even at his vacation home in florida. even there, signs of protestors hunting him down. >> walter palmer is one of thousands of americans who do globe trotting safari hunting exercises, and we should really shame these people. >> reporter: trophy hunters kill about 600 african lions every year and two-thirds of the trophies end up right here in america. animal rights advocates hope the outrage at this dentist will bring greater protection for the lions. david wright, abc news, new york. >> david, thank you. we turn now to an abc news investigation. some call them the forgotten children of mexico city. think of this number tonight, the list of billionaires in mexico growing now worth more than $144 billion. yet in the shadow of all of that money, the children left behind. tonight after months of investigating, a major development. >> reporter: we traveled the streets of mexico city in search of the children. abc news getting the blacklist, obtained by disability rights international, facilities the government says are abusive, in bad condition, yet children still dropped off. >> authorities put these institutions on a blacklist but they're still open. >> yes. >> does the public know about the blacklist? >> no they don't know. >> reporter: they're about to. we walk up to the metal door behind it an unsettling maize of locked doors, padlocks on nearly every door every window. children of all ages many left by parents, some with disabilities some from detention centers all under one roof. commotion outside this battered door no doorknob a little girl peering out. she had been locked in the bathroom. children mopping for fun. government money keeps this home open even though it's on the government blacklist. >> did you find any evidence of doctors? >> no. >> therapists? >> no. teachers no no psychiatrists, nothing. >> reporter: the next stop we're told even worse. through the front door and right into the standing water. and this is another one of those blacklisted facilities here in mexico city. as you come up the stairs we've been told there are about 20 children living in this building right now. many of the rooms are absolute squall lohr. >> reporter: in one room you cannot see the floor. >> look at the floor. in the garbage, there's a child. yeah there's kids. there are children in the corner there. >> reporter: and still a smile from a little girl in red. >> why would you bring a child here in the first place? this is standing water. >> it is total abandonment. mexico is falling short. these are fundamental human rights violations. >> reporter: lastly, past this green gate a facility not on that list but getting government money. children with disabilities inside cages, rows of them locked up. a boy named you'll julio alone in a corner. eric rosenthal, the founder of disability rights international shows me andres. >> this is complete neglect. >> reporter: all you can hear is the boy clenching his jaw. >> his clenching jaw is making more noise. >> he knows we're here. >> reporter: we hold this boy's hand and immediately he smiles. we asked the nun, is he okay spending all of these hours alone? he's happy, she tells us. this boy in the wheelchair the worker trying to shake him back into the seat. we noticed this by hanging by his hands over a treadmill. but the directors tell us they are clean, fed, they have a place to live. >> he spends 24 hours a day in this cage? >> they take him out for one hour. >> the moment i put my hand in, he grabbed my hands. >> yeah if you sat down and put his arm around him, he would have smiled. >> people are going to look at these children in cages and think these are images we haven't seen since the 50s. >> that's because they don't know. >> reporter: authorities telling us there will be an immediate government order. the ministry for social development telling us mexico city will immediately ban all cages, all restraints a victory. their work hardly over. remembering the children's faces and the toys they showed us. eager to talkke a walk with a reporter past those cages for good. >> in addition to getting rid of the cages, mexico city has greed agreed to help start a program to get those children back into the community. president george h.w. bush sending this out, tonight tweeting who knew jumping out of planes was safer than getting out of bed. two thumbs up there. he's expected to make a full recovery. we love seeing that. the urgent plea at this hour from the fbi, the bank bandit with an ak-47 moving across the country. look at this surveillance video. the fbi says this man has hit six banks in five states already. also tonight, the long-time tv actress beloved by many rushed to the hospital. we have news on her condition tonight. and they say there's no crying in baseball, but look at this face getting a lot of sympathy tonight. what happened in the moments after those tears and what caused those tears in the first place? it wouldn't make sense if you turned on something in one room and it turned on everywhere else. but that's exactly how traditional cooling and heating systems work. so you pay more than you should. but mitsubishi electric systems give you a better way... with no waste and lower energy bills. control temperatures precisely in one or every room ... ...with no new ductwork. so everyone 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phones hearing wilmer had been traded. >> the fans giving him a nice sendoff here. >> reporter: what no one knew is that he hadn't been traded at all. because the fans were cheering him off, it appeared he thought he was done with the team too. wiping away tears with his glove, then his sleeves. after the manager had a message for the fans who got it wrong. >> i don't know why anybody comes. sit home and watch games on tv and their cell phones. >> reporter: the moment somebody told him wilmer was trying. >> somebody came to me and said wilmer is crying. i said why. >> there's no crying in baseball! >> as for wilmer -- >> i'm sorry he's upset. >> reporter: he delivered a pep talk. >> son, you're the short stop right now. you've got to get ready to play. >> we're rooting for him. thank you for watching. i hope to see you back here tomorrow. good night. this is "jeopardy!" today's contestants are a high-school principal originally from chatham center new york... ...an attorney from silver 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