When newlyweds Sherri Rasmussen and John Ruetten kiss each other goodbye on the morning of February 24, 1986, it'll be the last kiss they ever share. Sherri is found dead in their home hours later and detectives struggle to solve her case for 20 years. [also shown as S1:E:3]

When 16-year-old Dinah Peterson sneaks out to see her boyfriend on Valentine's Day, she never makes it home. As the small town gossip spreads, the case takes a shocking turn and a 30-year-old secret is finally revealed.

When art student Samantha 'Shelley' Nance's deceased body is discovered by her college roommate in 2009, campus erupts with gossip. Jealousy and secret crushes make for strong motives, but detectives struggle to pin the suspect. [also shown as S1:E:4]

Brian Barrett was shot to death just before he was supposed to meet his online dream girl. To catch the killer, police must venture into the murky world of chat rooms, but how can they solve the case when the killer is a virtual shadow? [also shown as S1:E24]

Jack Jessee is fighting a losing battle with cancer, but his remaining time is cut short when he is stabbed to death in his own home. Police quickly determine this is not a random crime, but all the best suspects have iron-clad alibis. [also shown as S1:E40]

When Carolyn Krizan-Wilson claims a barefooted burglar assaulted her and shot her husband Roy McCaleb to death, police spend years trying to track down the mysterious killer. It's only with the onset of dementia that Carolyn finally reveals the missing clue. [also shown as S1:E42]