in 1984 Jonelle Matthews went missing from her home in Greeley, Colorado. After her family was ruled out as suspects, investigators had nothing to work with. It took 35 years before there was a break in the case. The main suspect in the case, who now lived in Idaho, wanted to let the police know about his alibi. So he mailed them a letter with his alibi, in detail. Who the hell does that? And there is a surprise guest on this episode!