welcome to "world news tonight." super showdown. the stage is set. donald trump and hillary clinton. >> donald trump is temperamentally unfit. >> she's a dangerous liar. >> their first head-to-head clash. 100 million people expected to watch. the race tightening.an trump's guest list. breaking news. all-star tragedy. one of baseball's best, jose fernandez, killed in a horrific boat accident. fans and his team stunned, and just days ago announcing he was going to be a father. new police video. for the first time, the moment police used deadly force. but the man they shot, walking backwards, hands by his side. officers say he was armed.

> mall shooting arrest. the suspected gunman caught, wanted for killing five people. police finding him in a, quote, "zombielike state." and, rising waters. massive flooding, homes under water, families evacuated. why it's expected to get worse. tonight, our team in the flood zone. good evening. thanks for joining us on this sunday. i'm tom llamas. we begin with the heavyweight showdown about 24 hours from now. final touches in place for the first one-on-one battle debate between hillary clinton and donald trump. clinton off the campaign trail for four days, practicing with mock debates. trump given videos of clinton's past debates. and house speaker paul ryan telling him to overprepare for the meeting. a new abc news poll underscoring the importance of tomorrow's debate.

points. a potential dead heat. here's cecilia vega. >> reporter: this is it. and these are rnc officials making their final checks. we're talking about history on the stage tomorrow. as many as 100 million people expected to tune in. we're talking about the super bowl of american politics. the road to the white house passes by this stage. the epic showdown a day away. tonight, a different grudge match over who gets an invite to the show. after the clinton team offered a seat to mark cuban. >> i just don't see him as being capable in the least bit. >> reporter: trump took to twitter, threatening to offer an invitation of his own. saying, "if dopey mark cuban of failed benefactor fame wants to sit in the front row, perhaps i will put gennifer flowers right alongside of him." gennifer flowers, being the woman who had an affair with bill clinton decades ago.

invited. >> this debate should not be about what billionaire can hillary clinton put in the front row. she has a right to be there if somebody else gives her a ticket. >> reporter: clinton, a veteran, with 34 presidential debates under her belt, has been deep in preparation, from briefing books to mock debates. >> donald trump's bigotry, his bullying, his bluster are not going to wear well on the american people. he's done 11, but never one-on-one, and no mock debates for him. just question and answer sessions. his aides worried he hasn't practiced enough. >> i'm the only one that beats hillary clinton. >> reporter: this time, just the two of them alone for 90 minutes. six topics. clinton gets the first question. trump has two minutes to respond. both sides, already fighting about moderators. clinton's team says it's their job to fact check.

it's pointed out. >> reporter: trump's team says, "not so fast." >> i really don't appreciate campaigns thinking it is the job of the media to go and be these virtual fact-checkers. >> and cecilia vega, just steps from the debate stage. you said clinton gets the first question. and tonight, you've learned other new details? >> reporter: yes, hillary clinton will be stage left, donald trump will be stage right. after the first round of ten minutes of open debate and conversation, and the rules came in part because of agreements between the campaigns, and also because of a coin toss. they won't tell us who won which ones. >> all right, cecilia vega, thank you. millions of americans watching tomorrow night. and these debates putting the spotlight of hillary clinton and donald trump at their best and at their worst. here's mary bruce. >> reporter: tonight, the candidates fine-tuning plans of attack.

nasty guy. >> reporter: clinton may try to get trump to lose his cool and raise questions about his temperament. >> you've called women you don't like fat pigs, dogs, slobs. >> only rosie o'donnell. >> reporter: clinton's dealing with a major x-factor. which trump will show up? >> look at those hands. are they small hands? >> reporter: will he be crass? or controlled? >> the guns don't pull the trigger, people pull the trigger. we have to find out what is going on. >> the job of hillary clinton is going to be tough if donald tr done what he's done the last few weeks, which is the "i'm not crazy" tour. >> reporter: for weeks, trump has tried to put clinton on defense. >> i did exactly what i should have done, and i take it very seriously. always have, always will. >> reporter: the challenge for her, showcasing her experience, and some personality. >> which enemy are you most proud of? >> in addition to the nra, the health insurance companies,

iranians, probably the republicans. >> reporter: both candidates hoping to avoid being their own worst enemy. those infamous debate blunders. from al gore's sigh to george h.w. bush and his untimely time check. and they need to make themselves seem more likable. our poll tonight showing both still facing unprecedented unfavorability ratings. tom? m dowd. there's still a large percentage of undecided voters. how important is tomorrow night? >> i think this moment of the campaign is the most important we've seen in the entirety of the campaign. the only really authentic moment to occur. the first time they stand on stage, basically naked in front of the public. >> i think hillary clinton needs to show more head, and less

and for donald trump, he needs to connect more at a rational level. and show more head. in effect, switching positions. >> no doubt it will be an exciting night. matt, thanks so much. abc news will have complete coverage of the presidential debate. that's tomorrow at 9:00 p.m. eastern, right here on abc. we move on to a stunning tragedy on the water. miami marlins star pitcher, jose fernandez, one of three killed in a deadly boating accident. here's marci gonzalez. >> reporter: tonight, investigators surrounding the chilling, overturned wreckage from an accident that killed a beloved baseball star. miami marlins pitcher jose fernandez and two other men

off the coast of miami beach. >> it does appear that speed was involved due to the impact. >> reporter: today's marlins game, cancelled as teammates tearfully pay tribute to the 24-year-old known for his fastball, infectious personality, and passion for the sport. >> when you watch kids play little league, that's the joy that jose played with. >> reporter: that joy, radiating through his pride at becoming an american. jailed in cuba as a teenager for trying to defect. u.s. on this fourth attempt. >> he sacrificed his life to leave an oppressed country. >> reporter: his grandmother, traveling from cuba in 2013, emotionally surprising him just before he was named "rookie of the year." and fernandez was starting a family of his own, posting this picture on instagram just five days ago of his pregnant girlfriend. >> it's a tremendous loss, and my heart goes out to his family.

or drugs were factors in the crash, adding fernandez and the other two victims were not wearing life vests. tom? >> marci, thank you. new developments in the deadly police shooting in north carolina. plus -- police under intense pressure. releasing two pieces of video revealing the moment officers shot and killed keith lamont scott. and police video should be made public. and the city bracing for a sixth night of demonstrations. eva pilgrim in back in charlotte for us tonight. >> drop the gun! >> reporter: tonight, the police video finally released. leaving many questions. showing keith lamont scott, b backba backing slowly. his arms stay down. then four shots.

the video that has been released. >> reporter: in the footage, officers run to scott with guns drawn. >> gun in his hand. gun in his hand. >> reporter: you hear the officers talking about a gun, but you don't see it. this video shows one of his pant legs lifted. >> when you look at it initially, it looks like some sort of leather device. you might logically conclude it's some sort of ankle hollister. >> reporter: family members say the father of seven was picking up his son from school. officers were in the neighborhood to arrest someone else when they saw him and made the decision to approach him. >> it doesn't make sense to us how it's possible that this incident resulted in the loss of life. >> reporter: video recorded by his wife, released by the family earlier, his wife there witnessed the shooting, clearly in anguish.

>> reporter: tonight, protesters outside of the panthers game, calling for more video to be released. >> we want the whole video, an undoctored video. >> reporter: police say they will release the rest of the video when the investigation is complete. tom? >> eva, thank you. to the west now, and new details about the suspect behind bars, accused of the mall shooting in washington state. the street, saying he was in a zombielike state. here's neal karlinsky. >> reporter: tonight, at alleged shooter arcan cetin's house, we found his stepfather outside and in no mood to talk. so, if you want to contact me -- >> please leave my property. >> reporter: overnight, police arrested the 20-year-old cetin simply walking down the street near his home, about 40 minutes from the scene of the shootings, a remarkably peaceful end to a horrific murder spree. >> he said nothing.

>> reporter: it took police 24 hours to track him down, following a breadcrumb trail of surveillance photos leading to his car. police say the man in shorts and a t-shirt, with a rifle, killing five inside this macy's friday night is cetin, a turkish immigrant and small town grocery bagger. the "seattle times" reports he has a criminal record, including domestic assault charges. people who knew the suspect say they saw nothing out of the ordinary. >> kids kind of recognized him. they said it might be. and i was like, "no way." >> reporter: police are looking into reports cetin's ex-girlfriend may have worked at the macy's, but for now, the motive remains unclear. the victims, ranging from a teenage cancer survivor to a senior citizen, were in the makeup department at macy's around 7:00 p.m. friday when gunfire erupted. police say they've ruled nothing out, but they don't believe there's a link to terrorism. and as the mall here prepares to

appearance. tom? >> thank you. and an urgent warning in the cleveland area, seven people dying from drug overdoses in just one day. investigators believe the drug involved was either heroin or fentanol. the medical examiner is looking for a possible link. now to the flood emergency in iowa. rivers rising, with evacuations in cedar rapids. the danger expecto >> reporter: tonight, the major flooding disaster in iowa is only getting worse. up to seven feet of water submerging homes. entire neighborhoods swamped by rivers. the only way in or out is by boat. >> you built what we thought was good enough, but it wasn't. we'll rebuild back. >> reporter: this baby deer getting caught in the water surge, a good samaritan rushing to rescue it from the dangerous currents.

scrambling to fill thousands of sandbags to protect against the growing threat. evacuations begin tonight as residents brace for one of the worst floods in the city's history. >> we need to push hard these next two days to be fully prepared for that crest. >> reporter: right behind me, one of several bridges shut down in anticipation of the water coming almost up to street level. which is why they built these temporary barriers. to keep the river from inundating the city. feet. as will the other tributaries to the mississippi. a long duration event they haven't seen since 2008. they're hoping they're more prepared this time. tom? >> rob, thank you. still ahead here on "world news tonight" this sunday, gunfire rings out near a major college campus. the suspect on the loose. what police are saying. and the little girl making a 911 call that may have saved her

are there lessons here for your family? and the daring coast card rescue. the cruise gone terribly wrong for one man. why he had to be airlifted from sea. hey, jesse. who are you? i'm vern, the orange money retirement rabbit from voya. vern from voya? yep, vern from voya. why are you orange? that's a little weird. rement. save a little here and there, and over time, your money could multiply. see? ah, ok. so, why are you orange? funny.

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back now with a life and death drama playing out during a family health scare. an 8-year-old may have saved her mother's life. here's gloria riviera. >> reporter: tonight, one mother

after a little girl's lightning-quick action helped avert tragedy. >> i was confused. i was like, what's wrong? >> hello, 911. do you have an emergency? >> i am in the house with my mom, and i think she is having a stroke now. >> reporter: 8-year-old a'nasia clayton was home alone with her mother in maryland recently when she noticed something was off. >> reporter: by luck, a'nasia had just looked up what a stroke is. she called 911, describing her mom's condition and taking action. >> the door is unlocked. i just unlocked it. >> all right, dear, you are doing a great job. your mom is going to be awful proud of you. >> reporter: and potentially saving her life. >> i love you. >> i love you, too. 4-year-old calise manning called 911 when her mom, nine months pregnant, had an epileptic seizure. >> she's having a boy, and she really needs help. >> how old are you, honey? >> 4. >> reporter: the ambulance came, thankfully all okay. experts say as soon as kids can memorize numbers parents can teach them how to recognize when someone is hurt, dial 911 and describe the emergency. for her actions, a'nasia won an award from her hometown.

>> gloria, thank you. up next, a network news anchor stepping down. the famous voice leaving television. and, she thought she had it. the photographer in the end zone. we'll tell you what happened here. ouch. and how she's doing tonight.

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time for our "index." a scare near the university of illinois college campus. a sten there. the shooting started in the middle of the night. police say one was killed, and five others were injured. the hunt is on for the suspect. and the dramatic cruise ship rescue. the coast guard saving a man during an apparent heart attack.

the emergency happening onboard the ruby princess. and take a look, the stunning kick into the end zone at the lsu/auburn game. the auburn photographer getting a football in the face. ashley ward was able to laugh about it later. she says she's doing quite all right. and a final farewell from a fixture of weekend television. >> i want to thank you all. our wonderful audience, and i also want to thank all these people. >> cbs newsman charles osgood, saying good-bye to his tv gig. for 22 years he hosted "sunday morning." it was charles and his signature bow tie. when we come back, the voice of the dodgers also taking a final bow. stay with us. like viagra single packs for ed. ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain or adempas? for pulmonary hypertension. your blood pressure could drop to an unsafe level.

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finally tonight, a look at one of the greatest runs in sports history. here's david wright. >> reporter: this weekend, they rolled out the blue carpet at dodger stadium. >> aw, come on. it's just me. >> reporter: the end of an era that's lasted 67 years. >> hi, everybody. and a very pleasant good evening to you. i thought i'd get that out of the way right away. >> reporter: vin scully has called them as he sees them since 1950. >> sandy into his wind-up. here's the pitch. swung on and missed. a perfect game! >> reporter: from sandy koufax and jackie robinson, through henry aaron, breaking babe ruth's home run record, for the opposing team. >> it is gone. what a marvelous moment for baseball. >> reporter: what did that

>> to me, i try to call the play as accurately and as quickly as possible, and then shut up, and let the crowd roar, because there's nothing better. >> reporter: fans watch with him even when they're there at the ballpark watching the game. >> thank you for painting a picture for us, for our families, that we'll have for the rest of our lives. >> reporter: for dodgers fans, vin scully was the soundtrack of summer. >> we will miss you, my friend. we will miss you in our radio, in our cars, in our backyard. >> reporter: an endless summer, finally finished. david wright, abc news, new york. >> and we thank david for that story. we thank you for watching. "gma" first thing in the morning. david muir right back here tomorrow night. i'm tom llamas in new york.

i have the best question ever coming up. these fan questions are great, and i'm glad we're getting them from the fans because that's who we're trying to speak to every week, and to have them watch the show so closely. they know it better than we do. we're on to your tricks. narrator: once upon a time... [ door opens ] sorry i'm late. narrator: ...an evil queen... destroy your happiness. ...cast a powerful curse... it's here! ...that sent every fairy-tale character to our world. and the power of magic... i love you, henry. ...was soon everywhere. these beloved heroes... is that it? ...have journeyed across realms... neverland. narrator: ...to amazing worlds... why, camelot, of course. narrator: ...searching for their happy ending.