Three college students believe it's their calling to rid Portland of its sinners, committing murders to make their point; in one of the largest manhunts in the city's history, detectives go after these cold-blooded killers before they strike again.

He was the most wanted man in America, a murderer on the run with nothing to lose and chilling confession letter threatening cops. And when he meets a single mom who falls for his charms, can he keep his secret, or will she be victim number four?

After Tiffany Jenks is murdered in Fairview Ore., an investigation uncovers multiple suspects, including Tiffany's ex-boyfriend and three strangers who met her at a bar; investigators discover a twisted and mysterious motive for murder.

After Kate Johnson is murdered in her dormitory room, detectives ask why this innocent young woman was targeted; detectives collect 400 DNA samples, establish a secret task force and track down Johnson’s killer to get their chilling answer.

In Portland, Ore., an Iranian woman lands the perfect job with an insurance agency, but her charm and intellect make her the focus of several male co-workers; corporate intrigue turns to cold-blooded murder when she’s found dead, shot in the head.

It’s a Christmas day murder scene Portland detectives will never forget, a young woman bound, gagged and mutilated in a horrific manner. And when the killer then turns his sick sights on Homicide Detective Molly Daul, the stakes rise even higher.

When Detective Molly Daul works two homicides back to back, she realizes she's dealing with a sexual predator who targets trusting young women. Arrested before he can kill again in Seattle, his chilling confession remains with Molly to this day.

When Ashley Benson is found murdered in a trendy Portland, Ore., hotel, detectives quickly dial in on three suspects, all of whom have been romantically linked to Benson whose parents must come to grips with their daughter’s secret life.