Vengeance: Killer Neighbors

A Tennessee man is shot down in front of his own home. Police use home video to unravel the history of the feud between the two men. Suspect: Kevin Lee Waggoner and Victim: Michael Woodby.

A local waitress and her family fall victim to a poisoning when tensions boil over between neighbors in small-town Florida. Suspect: George James Trepal and Victim: Peggy Carr.

These neighbors argued about their residential fencing. Suspect: Lonnie Paul Tracey and Victim Anthony Jay Davis.

In New Brighton, Minnesota, police begin receiving calls of shots fired, and learn that one of the neighbors is angry over the sight of too many deer in his yard. Suspect: Neal Zumberge and Victim: Todd Stevens.

Police must investigate a crime when a BBQ in Titusville, Florida, turns into a bloodbath. Suspect: William Woodward and Victims: Gary Hembree and Roger Picior.

When a wealthy neighbor buys up Montana land and restricts access to the public mountain trails beyond his property, one man cuts the locks and ends up dead. Suspect: Joseph Campbell and Victim: Timothy Newman.

When a man is murdered at his home, investigators discover evidence of a neighbor's plotting. Suspect: Malaika Tamu Griffin and Victim: Jason Patrick Horsley.

A gay rights activist is stabbed to death in his own apartment. Police uncover a dark world of paranoia and delusions lurking in the heart of London, England. Suspect: Enrique Facelli and Victim Julian Aubrey.

A front yard brawl between two Euclid, Ohio, families leaves one person dead and investigators wondering how teenage heartbreak started it all. Suspect: Ashley "Sparkles" Berger and Victim: Vanessa McMorick.

A mother who is a recovering addict is stabbed while standing up to the neighborhood bully. Grainy video and unreliable witnesses make the investigation difficult for the police. Suspect: Angela Burkitt and Victim: Joanne Hemingway.