Cold Blood - Season 4

An investigation into a 23-year-old Hawaiian tourist's rape and murder reveals a world of drugs and deception few vacationers ever see. And it's up to one lone detective to get the victims family some justice.

South California is the perfect place to retire, but when an 84-year-old is brutally raped and murdered in her senior living community everyone is a suspect. To find her killer, the investigation goes global as the suspect does his best to slip away.

An 18-year-old runaway is found raped and strangled to death on the side of a San Diego road. Tracking down the cold-blooded killer will take years of detective work and a benign connection.

In Colorado, a lifelong bad boy comes home to finds his wife, savagely raped and strangled to death. Evidence indicates the attack is personal. But is the husband is trying to get away with murder or could someone else be involved?

Murdock Nebraska, a man returns home to find his mother and father shot to death. Nothing of value is missing. Everyone in town is stunned by the news and they begin to wonder, is the killer someone they know?

Minneapolis, Minnesota is a haven for its large gay community, until gunfire rips through the city leaving two men dead. An eyewitness leads investigators to a suspect, but soon after, an anonymous letter points to an anti-gay hate group.

Miami's Coconut Grove rarely sees trouble. Until José Calvo, a family man, is shot in the head and robbed of his Rolex watch. What appears to be a random cash grab turns into a sinister mystery. Is this a robbery gone bad or a murder for hire?

Aiken, South Carolina, is a tiny peaceful town where nothing much happens. Until Jessica Carpenter, 17, is found raped and murdered in her living room. The neighborhood goes on high alert while police swing into action to catch her killer.

In one of the most notorious missing children cases, Adam Walsh steps into a stranger's car and disappears. A manhunt is launched but Adam's severed head is found two weeks later. More than a quarter of century passes before the mystery is solved.