people. the twister touching down hit a mobile home park and a hotel. search and rescue teams are out searching fthe ruins right new. we'll keep you posted. and residents of ft. smith, arkansas, are preparing for historic levels of flooding. floodwaters are expected to reach 41 feet breaking the previous record of 38 feet set in 1945. now back to "dateline." welcome back. marley carlson had disappeared without a trace. she hadn't taken any extra clothes or her mystery, her car was at the airport but she never got on a plane. was she depressed? that's what the pastor and his wife she'd been living with told investigators. short on clues, detectives thought they knew one thing -- marie didn't just vanish. and now the missing persons case it hit and runned into a mrpd