On July 23, 1991, they took Cynthia's two sons on a day trip to a big lake called Lake Sammamish. This is the same lake where Ted Bundy had kidnapped two young women years before. It was hot when the Roths arrived and the beach was crowded. Randy and Cynthia left the boys to play in the swimming area while they paddled their inflatable raft into deeper waters. Several hours later Randy Roth came back with Cynthia. She was either dead or dying from drowning. Lifeguards and paramedics tried to save her and take her to a hospital. She was dead when she got there. Randy Roth said that waves caused by a motorboat made the raft flip over and that Cynthia drowned because of that.