Overturned by Top Administration officials. The urgent manhunt tonight in los angeles. Police searching for the killer of a grammynominated rapper. Gunned down outside his store. He was set to meet with the lapd just today to help stop the violence. Lebron james, steph curry, john legend all paying tribute. Also tonight, mick jaggers health scare. The major tour put on hold. Is and what weve now learned. The major fire erupting, workers raced outside. Firefighters rushing to get nearly two dozen employees and customers to safety. And the 6yearold boy who collapsed and died an hour after this baseball photo was taken. What caused it . Good evening and its great to be back with all of you at home tonight. And we begin this evening with former Vice President joe biden, even before declaring a run for president , the headlines mounting. Tonight, a second woman has now come forward, accusing biden of inappropriate behavior. Even before this second allegation, biden acknowledging, quote, expressions of affection, support and comfort in my many years in public life, but adding he never believed he acted inappropriately. First, it was a former nevada politician who claims biden touched her shoulders and kissed her head during a campaign event. And tonight, a second woman, a former congressional aide, said biden got too close to her, as well. Abcs mary bruce leading us off. Reporter tonight, joe bidens wouldbe campaign is facing a major test, with two women accusing the former Vice President of touching them inappropriately. Today, amy lappos of connecticut tells the Hartford Courant it happened to her at this fundraiser in 2009, describing the scene to our affiliate, wtnh. He reached over and put his hands behind my head and pulled me close and i thought, hes going to kiss me. Reporter former nevada lawmaker lucy flores says she had a similar encounter with biden at this 2014 campaign event. I felt him get closer, he leaned in and was, like, right behind me, on my body. And he leans down, smells my hair and plants this big, long kiss on the top of my head. Reporter in a statement, biden admits, in my many years on the campaign trail and in public life, i have offered countless handshakes, hugs, expressions of affection, support and comfort. But says, not once never did i believe i acted inappropriately. If it is suggested i did so, i will listen respectfully. But it was never my intention. I dont believe that it was a bad intention. Im not in any way suggesting that i felt sexually assaulted or sexually harassed. I felt invaded. Reporter flores, who was a Bernie Sanders supporter, once appearing in a campaign ad for him, insists this isnt a political hit. Bidens behavior has sparked questions before, like this incident in 2015, when biden put his hands on incoming defense secretary ash carters wife, stephanie, whispering in her ear during her husbands swearingin. But now, Stephanie Carter is coming to bidens defense, writing in a online post, the joe biden in my picture is a close friend helping someone get through a big day, for which i will always be grateful. So, lets bring in mary bruce, shes live in washington tonight. And mary, some of bidens potential opponents are already weighing in on these accusations . Reporter david, Elizabeth Warren says she believes lucy flores. While Amy Klobuchar says she has no reason to doubt her story. They want answers from joe biden, but david, they are stopping short of calling this disqualifying. They say its up to biden to make his own decision. David . Mary bruce leading us off. Mary, thank you. Also breaking just a short time ago, the medical examiners report is now out tonight, and what it reveals about the horror that College Senior faced when she got into the wrong car, thinking it was the uber she ordered. This is the surveillance of the 21yearold getting into that car. The driver tonight is now charged with kidnapping and murder. He engaged child locks on the doors inside. And abcs Victor Oquendo is in columbia, South Carolina, tonight. Reporter it was the last time 21yearold Samantha Josephson was seen alive, here on this surveillance video, outside a bar early friday morning, hopping into what she mistakenly thought was her uber ride. Police in columbia, South Carolina, say the man behind the wheel kidnapped and killed her. The Child Safety Locks were activated on the door, that would not allow someone to the means of escape. Reporter tonight, 25yearold Nathaniel Rowland under arrest, after hunters found the body of the university of South Carolina senior in a rural area. According to a police report, investigators recovered bleach, josephsons phone and traces of her blood from his car. An autopsy today revealing she died from multiple sharp force injuries. Samanthas anguished mother speaking out in court. It sickens us to think that his face was the last thing that my baby girl saw on this earth. Samantha was by herself. She had absolutely no chance. Reporter overnight, her father joining hundreds at a vigil on campus, urging anyone using Ridesharing Services to travel in groups. What we have learned is that you guys have to travel together at night. Victor oquendo live with us tonight from columbia. And victor, were now hearing from uber as well tonight . Reporter thats right, david. Uber offering their condolences and calling this an unspeakable crime. Police say that this is the spot where Samantha Josephson got into the wrong car. Some important safety tips tonight from uber. They want all their passengers to double check and see that the license plate, the make and model all match what you have on your ridesharing app. You can also ask the driver who theyre there to pick up. David . Yeah, always check that license plate. Victor oquendo, important advice. Thank you. And there is also an urgent hunt tonight for a hit and run suspect outside atlanta this evening, after a driver is seen speeding across a familys lawn, hitting their 9yearold daughter. Her parents have released the video tonight. They want the driver caught. We will not show the moment here, but the daughter does survive. And heres Abcs Steve Osunsami from atlanta. Reporter police in dekalb county, georgia, tell us theyre chasing down leads tonight in the case of the 9yearold girl seen in this horrifying surveillance video. Shes being hit by a speeding black sedan that crashed into her front yard while she was playing with a friend. I just want everybody to pray for laderihanna. I just want the people involved to be caught. Reporter Laderihanna Holmes was rushed to the hospital friday evening with broken bones, a skull fracture, a leaking heart and other wounds. Shes a cheerleader who loves to tumble. Her mother says doctors are telling them shell be able to do those things again. In the hospital today, she was smiling. Shes strong, and i know shes going to bounce back from this. Its just going to take awhile. Reporter the disturbing video shows the car blowing a stop sign and then hitting the girls as they were trying to get out of the way. Weve stopped the picture before impact. The other girl suffered minor injuries. Two people get out of the vehicle after the crash and then run away. The family believes theyre teenagers. Steve osunsami with us outside the hospital in atlanta where that 9yearold is recovering tonight. Thats good news, steve. And Police Sources are telling you that theyre now closing in on possible suspects . Reporter thats right, david. Police say that they actually know who the two young people were who were inside that car. Meanwhile, the girl remains hospitalized behind me and despite those smiles, she is still, david, in the icu. All right, Steve Osunsami with news from his sources tonight. Steve, thank you. Now to the search for a 15yearold louisiana girl tonight. Police believe she may have run off with a 47yearold neighbor, a divorced man with three children who became friends with her family and who had hired her to babysit. Tonight, what her family has now told the fbi, and heres abcs marcus moore. Reporter tonight, Louisiana Police and the fbi in a desperate search for 15yearold domeanna spell. Authorities believe she may have run away with 47yearold cory stephen disotell. Her distraught family, handing out flyers, now fear she may have dyed her hair to disguise her appearance. Police say they could be in a 2003 honda civic sedan. The missing teen was last spotted on thursday getting off of her school bus. Spells family telling abc news, the teenager was a babysitter for disotells kids. Seen here smiling in a selfie with the 47yearold. They claim they alerted police about disotell after seeing numerous texts to their daughter. Police are not commenting about the parents warning. And david, investigators have put out a call for the public, friends, even classmates to come forward with any information on where these two may be. David . Marcus, thank you. The whistleblower coming forward to congress tonight, with what she says is a Serious National Security concern, claiming that at least 25 people, including two senior white house officials right now, who were all granted security clearances despite initially being turned down during the security check. Abcs Kyra Phillips tonight on the reasons they were denied at first, only then to be allegedly cleared by the white house. Reporter tonight, a whistleblower working inside the White House Tells Congress top officials authorized security clearances for at least 25 people whose applications had been denied for reasons including foreign influence, conflicts of interest, concerning personal conduct, financial problems, drug use and criminal conduct. Tricia newbold, who has worked in the White House Personnel Security Office for 18 years, warns the situation could impact national security. She says among those 25 people, two very senior white house officials with significant disqualifying factors, including foreign influence and outside activities. A memo released from the House Oversight committee doesnt name names. And earlier this year, President Trump denied he had overruled Security Officials to secure a top secret clearance for his soninlaw, jared kushner. Did you tell general kelly or anyone else in the white house to overrule Security Officials . No, i dont think i have the authority to do that. Im not sure i do. But i wouldnt i wouldnt do it. Jareds a good i was i was never involved with his security. Reporter ivanka trump doubled down in this interview with the views abby huntsman. The president had no involvement pertaining to my clearance or my husbands clearance. Zero. Reporter but just days after that interview, the New York Times reported the president had, in fact, ordered his former chief of staff, john kelly, to grant kushner that top secret clearance. And Kyra Phillips with us live tonight from the white house. And kyra, we know no response from the white house as of yet, but republicans on the Oversight Committee are already pushing back on the whistleblowers account . Reporter thats right, david. Republicans saying tonight that newbold had trouble recalling specific details during her testimony, and democrats are preparing to subpoena her former supervisor as early as tomorrow. David . Kyra phillips at the white house tonight. Always good to have you, kyra. There is news tonight on the showdown over the border. President trump threatening to completely shut down the border as soon as this week, but no plan has been revealed as of yet. And abcs chief National Correspondent matt gutman is on the texas border tonight. Reporter gridlock tonight at one of the busiest american border crossings in el paso, with millions along the 2,000milelong border waiting to see if President Trump follows through on his threat to shut down the border if mexico doesnt stop the flood of Asylum Seekers heading to the u. S. And if they dont stop them, were closing the border. Well close it. And well keep it closed for a long time. Im not playing games. Reporter customs and Border Patrol estimates more than 100,000 migrants were stopped at the border in march alone. An even higher number expected in april. El paso typically sees a million cars and about 70,000 trucks cross over these bridges into el paso every single month. Now, the last time that these bridges were closed for any reason over three decades ago. Tonight, the chamber of commerce predicts, quote, an unmitigated economic debacle if the president carries out his threat, warning 5 million american jobs would be in immediate jeopardy. About 1. 7 billion worth of commerce flows across the border every day. And 40 of all fruits and vegetables that come into the u. S. Come from mexico, which could mean higher prices at the supermarket. Hardest hit could be el paso, whose republican mayor is sounding the alarm. What happens to the city of el paso if that border shuts down . Well, its critical to the city of el paso and its critical to texas and its critical to the nation. It would be harmful all the way around. Reporter 103 billion just in el paso . Just through our ports here on an annualized basis. Back and forth, imports and exports. So many parts to this story. Matt gutman with us live from the texas border tonight. And matt, President Trump, we know, as you reported there, has threatened to shut down the border this week, but so far, the white house hasnt released any plan on how this would work . Reporter no, and neither, david, has the white house told dhs officials when this possible closure might happen. Now, dhs officials tell us they will be meeting with the white house this week to craft some sort of plan. David . And matt, while we have you, who are the people were looking at behind you there . Reporter these are people who live in mexico but work in the United States and are crossing back as they do nearly every single day, david. Matt gutman with us live again tonight. Matt, thank you. Two marines have died in a Helicopter Crash during a Training Exercise in arizona. It was the first crash for the marines in one of the newest attack helicopters called the viper. The routine flight was out of the air base in yuma, after dark on saturday. The marines are withholding the pilots identities tonight, pending notification of their families. We turn next tonight to the manhunt amid an outpouring of grief after the murder of a rising music star, rapper Nipsey Hussle, who was grammynominated. He was a former gang member who had turned his life around and was set to meet with the lapd just today. He wanted to help end the gang violence. Abcs Adrienne Bankert is in l. A. Tonight. Reporter rapper Nipsey Hussle was set to meet with l. A. Police today to work on stopping gang violence. Instead, the community is mourning his passing. The artist gunned down in broad daylight in front of the Clothing Store he founded. Millions off of retail once again i prevail reporter born ermias asghedom, the 33yearold started out selling mix tapes from his car. Just this year, he was nominated for his first grammy. This is my first album, so, you know, thats important, thats special. Reporter stars including rihanna, john legend and the nbas steph curry paying tribute. Obviously sending prayers to his family, his community. Reporter the young father, with admitted ties to an l. A. Gang, remembered most as an entrepreneur, activist and advocate. He called for peace. He called for justice. Were calling upon whoever killed nipsey to turn yourself in. Reporter david, weve been seeing a steady stream of people coming to pay tribute to hussles life. There are more than 1,000 filling the parking lot where he was gunned down. Police are looking for at least one shooting suspect. David . All right, Adrienne Bankert with us tonight. Thank you. Theres still much more ahead on world news tonight this monday. The major news on gas prices coming in tonight. Also, tragedy on the baseball field. The 6yearold boy who collapsed and died just an hour after this baseball photo was taken. And we have news on what caused it. Theres also news tonight about mick jaggers health scare. The major tour now put on hold. And what weve learned. And the huge fire erupting, firefighters rushing to this scene to get nearly two dozen employees and customers out of this building. A lot more news ahead on a monday night. Stay tuned. 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