tonight, the hunt for a motive. and, mountain emergencies. skiers plunging to the ground. when the lift cable snaps. dozens of others trapped for hours. the little boy that slipped off the chair. the hidden danger before you even hit the slopes. good evening. thanks for joining us on this sunday. i'm tom llamas. we begin with the campaign for the presidency. looking different for both parties tonight. donald trump, victorious in the south carolina party. his whole family there to celebrate with him. the win by double digits. but the fight for second place came down to just over 1,000 votes. marco rubio edging out ted cruz. and any hope of another bush presidency now over. jeb bowing out. here's jonathan karl.

>> reporter: donald trump is now unmistakably on top. >> tall, short, fat, skinny people just won. >> reporter: he was on such a high after winning in south carolina, he briefly turned the mike over to his wife melania. >> he will be the best president. >> reporter: and his very pregnant daughter ivanka. >> the momentum since the beginning of this campaign has been unbelievable. >> reporter: it was a clean sweep, scoring all 50 of the state's delegates. he even came out on top for evangelical voters. >> i didn't know i was going to win by that much. it was record-setting stuff. >> reporter: with jeb bush calling it quits, the battle senators are up against each other. trump, rubio sees reason for

>> we need to remember here, over 70% of republicans have said, we're not voting for donald trump. >> reporter: donald trump continues to say cruz is ineligible to be president because he was born in canada. and today on "this week" george pressed him on something he retweeted that suggested that rubio is also ineligible. >> you're really not sure? >> i've never looked at it. honestly, i've never looked at it. somebody said he's not, we retweeted it, we started a dialogue and it's very interesting. >> reporter: rubio laughed it off. >> with just heard donald trump say he's not sure you're eligible to run for president. your response? >> well, this is, look, this is a pattern, a game he plays. i'm going to spend zero time on his interpretation of the constitution, with regard to eligibility. >> reporter: trump has a chance to show more momentum in just two days.

trump with a big lead. >> on that point, let's bring in matt dowd. does trump now need a strategic game plan? >> he has a better gut sense of the gop game than any other campaigner. donald trump needs to keep winning, because winning begets winning. and momentum at this point is more important than anything else. he needs to start using language that consolidates the party, second, stop with the insults. and spend a little time preparing for the debate. >> we'll see if he changes. thank you.

caucuses. med meetd immediately moving on. celebrating at a rally in houston. her margin of victory was a slim one, but included big support from african-american voters. here's mary bruce. >> we just won nevada! >> reporter: hillary clinton is relishing her nevada win and looking ahead. >> hello, houston! is this a great night or what. >> reporter: celebrating with a late-night rally in texas. >> victory is nigh. >> reporter: her campaign is confident, they see a clear path to the nomination. clinton held off bernie sanders' late rise to take nevada by five points. >> thank you very much. >> reporter: sanders, enjoying a strong second finish. were 25 points behind in the polls. >> reporter: but the candidates

key latino vote. >> as i understand it, we won the latino vote yesterday, which is a big breakthrough for us. >> that's just not what our analysis shows. >> reporter: clinton did win huge support from african-americans. whose vote will be critical in the next big contest in this south carolina. as she discussed with b.e.t. >> from a strategic standpoint, who's the african-american voter that your campaign is targeting? >> as many as possible. >> of course. >> reporter: sanders, with stops in south carolina. >> we need your help. to help lead this country in a political revolution. >> reporter: tonight, joined by danny glover in his biggest event in the state so far. the clinton campaign is happy with the win here. but acknowledges not every state looks or votes like this one. they fully expect sanders to win some states on tuesday. tom?

we move on to a shooting spree in michigan. six killed. apparently random. police arresting this man with no criminal record, but is an uber driver. here's alex perez. >> reporter: tonight, investigators in a kalamazoo, michigan, on the hunt. after a deadly rampage leaves six dead. the suspect, jason dalton, now behind bars. the chaos beginning at 5:42 p.m. saturday. a woman shot, but she survives. four hours later, in this parking lot, a father and his son shot and killed. within minutes, the gunman opens fire outside a cracker barrel restaurant. killing four in their car. including a former teacher, and critically wounding a 14-year-old girl. >> dispatch all units. suspect vehicle in a shooting. >> reporter: just after midnight, police spot the

into custody. without incident. the victims, police say, apparently selected at random. >> this is your worst nightmare. how do you go and tell the families of these victims that they weren't targeted for any reason other than they were there to be a target? >> reporter: 45-year-old dalton had no criminal record, and worked as an uber driver. his neighbors, in disbelief. >> it's scary. that could have been us, my daughter that got killed. >> reporter: tonight, authorities investigating on whether the alleged gunman was taking fares between shootings. matt melon claims he was dalton's passenger just 45 minutes before the first shooting. >> we were driving through

we were speeding along, once he came to a stop, i jumped out and ran away. >> reporter: tonight, uber saying we're horrified and heartbroken. we've reached out to the police to help in any way that we can. investigators recovered a gun from dalton's vehicle. he is expected in court tomorrow afternoon. >> thank you. overseas, isis taking responsibility for bombings in the city of homs. as jennifer eccleston reports, the attacks come as john kerry announced progress toward a cease fire. >> reporter: terror struck in quick succession in the syrian capital.

suicide vests and a car bomb were responsible. targeting a neighborhood of damascus, home to one of shia's most holy shrines. here, too, a neighborhood dominated by minorities within islam. those reviled by the sunnyi radicals within the islamic state. and this, as news between rebel fighters and syria's government. jennifer eccleston, abc news, syria. and one of the most powerful storms to ever hit in fiji, after cyclone winston hit. where wintd winds up to 116

the cleanup under way. the cyrfew extended through monday. back here at home, a high-stakes twist in bill cosby's legal drama. tonight, the cosbys' lawyer firing an emergency motion to spare his wife. linsey davis with the latest. >> reporter: tonight, camille cosby is fighting back. filing this motion to postpone her deposition tomorrow at a massachusetts hotel. his wife of 52 years has been hoping to avoid answering any questions, citing marital privilege. she served as his business

but mrs. cosby says her public testimony would create an unnecessary media circus. >> no wife wants to go into a deposition or public forum and have to testify about her personal relationship with her husband. definitely not testify about his relationships with other women. >> reporter: more than 50 women have forward. through it all, camille cosby is standing by his side. saying, he is the man you thought you knew. she still has the right to claim mareital privilege.

roads, like this one in pennsylvania. drivers spend $3 million per year fixing the damage to vehicles. gloria riviera has the story. >> reporter: they are the craters on your commute, causing serious damage. tonight, cities are scrambling to fix the seemingly endless pothole epidemic. roller-coaster temperatures in part to blame. the freeze/thaw effect causing ruptures, especially in older roads. and in the last five years, 16 million drivers suffering damage, on average paying $300 to fix it.

repairs, and even axle damage. >> we fill them, and sometimes stay come right back. >> reporter: you can't fill them fast enough. >> can not. >> reporter: if you do hit a pothole, you may be able to be reimbursed. if you were on a local or state road, reach out and document everything. >> thank you. still ahead, when the slopes turn dangerous. a little boy dangling from a chair lift. how to stay safe before you hit the mountain. plus, the nasa moon secret revealed. we'll play for you the mysterious sound astronauts heard as they circled the moon. nasa still has no idea what it is. but with my back pain i couldn't sleep... so i couldn't get up in time.

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we're reminded of that by two recent chair lift accidents. but there are ways to stay safe as you make your way up to the mountain. here's clayton sandell. >> reporter: for more than six minutes, this 11-year-old boy dangles from a chair lift. he tried to catch his ski pole. then the dramatic moment, rescuers holding out a tarp, and urging him to let go. he was not hurt. there are roughly 3,500 ski lifts in the united states. accidents are rare, but ski resorts are reminding people how to stay safe. >> you think you're going to drop something, it's best just to let it drop. and then somebody can go back around and pick it up for you. >> reporter: but sometimes there are mechanical failures, like yesterday in west virginia. 25 people fell when the lift

dropping 30 feet. 100 skiers delayed. rescuers using harnesses to rescue them. two needed extra medical attention for minor injuries. the timberline four seasons resort saying all lifts undergo rigorous inspection. and are in compliance with safety standards. clayton sandell, abc news, denver. >> thank you. when we come back, the pope's plea to world leaders. what he's urging them to do tonight. will they take action? and the dramatic rescue at sea. and a wild finish at daytona. almost too close to call.

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for the guilty as well as innocent. to a really close call in oklahoma. an inspector looking at a gas leak when it suddenly exploded. the home was under construction. no one was hurt. police believe a stolen stove may have caused the home to fill with gas. and a helicopter arriving just in time to save some surfers off the coast of washington state. look at the waves knocking the surfer around. they got to this woman just before a huge wave sends her surfboard flying. the three people rescued were not injuried. and now to a nasa secret about the moon. the apollo x crew claiming that in 1969, they heard bizarre whistling music. this is what they heard.

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[ applause ] the what?! [ laughs ] finally tonight, in the middle of a grocery store aisle, one man's heart started to give out. complete strangers jumped into action. but it turned out, they were not all strangers. here's john donvan. >> i was really going. >> reporter: michael kitty knows he very nearly died today. he collapsed here, he was stocking shelves when his heart stopped. >> he's not breathing. a young man is trying to help. >> reporter: this high school student was in the store and rushed over. he started administering cpr. >> i checked his respirations and his pulse. we didn't have anything. >> reporter: two nurses jumped into the rescue.

purple. and he didn't have in pulse. >> no pulse, no respirations. >> reporter: then the emt and fire department got the call. >> cpr in progress. cardiac arrest. >> reporter: including this man, who didn't realize at first, that the life they were trying to save was his dad's. in the rush, he didn't get a good look at the face under the oxygen mask. >> it's a different experience when you realize it's a family member. >> reporter: well, you know how it ends because you've met michael kitty. and he's out of the hospital, and thanking everyone that had a part. those that did their job, and those that just happened by and jumped in. john donvan, abc news, washington. >> thank you. "gma" first thing in the morning, david muir will be right back here tomorrow night. i'm tom llamas in new york.

here's a sneak peek at tonight's "afv." we know you're gonna love it! oh! man: ohh! [ screaming ] yeah. whoa! [ laughing ] [ cheers and applause ] welcome to "america's funniest home videos"! and now here he is, the host of our show, alfonso ribeiro! hey!

thank you, guys! oh, that's... hello, and welcome to "afv." if you want funny videos, you've come to the right place. if you want dogs and pranks and people going boom, you've come to the right place. if you want deeply nuanced storytelling that probes the depth of the human psyche... we've got dogs and pranks and people going boom. [ girl screams ] they say you should get right back on the horse that threw you. same goes for lawn mowers. what are you doing? whoa. the faster you spin this, the faster your getaway needs to be. are you okay? oh!