annie kasprzak had been brutally murdered and dumped into the jordan river. >> we kept asking, are you sure it wasn't an accident? the idea that somebody else could do that to her was just -- even now, it's hard to imagine that that's even possible. >> reporter: and now draper police were working hard to catch her killer. >> we're trying to actively locate suspects in this case, any witnesses, so we can actually bring this case to a conclusion for the parents. >> reporter: and within a week of annie's murder, they found that witness. her name was joanna, and she had been picked up on a fraud charge