When 30-year-old Alyssa Romine-Olson is found floating naked and face down in the pond of a Gilbert, Arizona nature preserve in 2016, online coverage makes the case sound like a suicide. But her missing belongings, an undetermined cause of death, and key evidence found at the scene tell a different story. And all roads seem to lead back to one man. But when his alibi is verified, the case takes some shocking turns.