When a wealthy neighbor begins buying up Montana land and restricting access to the public mountain trails beyond, one man cuts the locks and ends up dead.

When Jason Horsley is gunned down in front of his home, investigators discover evidence of a neighbor’s deadly plotting, but it would take six years to track the killer down.

When a gay rights activist is stabbed to death in his own apartment, police are tasked with tracking down his killer—and in the process, they uncover a dark world of paranoia and delusions lurking in the heart of London.

A front yard brawl between two Euclid, Ohio families leaves one person dead and investigators wondering how teenage heartbreak started it all.

When a mother and recovering addict is stabbed while standing up to the neighborhood bully, grainy video and unreliable witnesses stand in the way of investigators determining who was holding the knife that killed her.

A string of murders targeting a pizza chain and its employees leads to a nationwide manhunt for a killer hell-bent on revenge.

When a lovers' spat ends up at the hospital, a biochemist's obsession with a coworker is exposed.

Celebrity real estate broker Linda Stein served New York's elite, but when she's found dead in her apartment, investigators are faced with a slew of powerful potential suspects.

A shooting at the University of Alabama Huntsville leaves three professors dead and the community questioning how they missed a murderer in their midst.

When cancer researcher Dr. George Blumenschein ends up admitted at his own hospital, a toxic work environment could be to blame.

When three hotel workers don't turn up for their shift, a bizarre series of discoveries reveals a twisted workplace love triangle.