Without a Trace Episode 4.04 Lost Time

Seven years earlier, university professor Thomas Beal confessed to and was convicted of the murder of his student lover, even though no body was found. After Skye Petersen's backpack surfaces in a pawn shop and video surveillance shows it was dropped off by someone who looked remarkably like Skye would have if she had lived, Jack reopens the case, concerned that his investigative tactics seven years earlier led to Beal confessing to a crime he didn't commit.