Season 3

The town of Plumville, PA, is rocked by the murder of Theresa Dalessio. Shot at home with her family nearby, the crime is confounding. Theresa has no obvious enemies, but as evidence emerges, suspects are revealed - including her own husband.

A loving immigrant family is devastated when Sandra Francis is murdered in her Boston apartment. A glut of recent homicides has left police stretched thin, so when the case runs cold, two dedicated cops develop a revolutionary technique to catch a killer.

A Pennsylvania family is decimated when masked men ambush them at home with guns and crude bombs, killing a mom and her daughter. The shell-shocked family points the finger at one of their own, but lack of evidence stalls the case for 30 agonizing years.

Miles City, MT, holds its breath while police search for missing husband and father Marty Etchemendy. As they race to find Marty alive and track down those who ripped him from his family, an air of evil permeates an abandoned car 100 miles from town.

The unspeakably gruesome murders of an elderly couple rock the town of Davis, CA. Police examine the victims’ bizarre injuries to determine if this is the random work of a sadistic psychopath or the premeditated plot of an unhinged family member.

Surveillance video captures the drive-by shooting of father Nicoh Mayhew. Nicoh's nephew is a prime suspect but has an airtight alibi - he's in jail. Crime scene video and jail calls uncover a murder plot that threatens the entire justice system.

Diana Duve's life seems idyllic - with close loved ones, a fulfilling nursing career, and a charming boyfriend. Then she suddenly vanishes, and the ensuing investigation unearths shocking revelations of a past riddled with vitriol and violence.

Racetrack horse groom Leslie Dickenson is found dead in her dorm, and her death is ruled a suicide. Her family balks, suspecting foul play, but they will face years of torment before a tip sends investigators on a 1400-mile hunt for a killer.

An Upstate New York cabby is shot dead in his car, and the entire area is dumbfounded as to who would kill a man known for his great generosity. A rapid-fire investigation leverages technology to uncover a treacherous plot hatched in a salacious affair.

Fresh-faced teen Barbara Rowan's family is devastated when she fails to come home one evening. Days later, she is found dead, but it will take three decades, a dogged cold-case detective, and advancements in crime technology to find her killer.