In the course of one year, 1984-1985, Richard Ramirez conducted a reign of terror over Los Angeles -- killing 13 innocent people. His highly publicized home invasion crime spree led to the media dubbing him the "Night Stalker."

On June 12, 2016, Omar Mateen walked into Pulse nightclub in Orlando, Florida and massacred 49 people -- while wounding an additional 53 -- in the deadliest attack in American history.

Randy Hausner, brother of serial shooter Dale Hausner, shares the story of a man who went on a killing spree in the city of Phoenix. In an effort to share his family's remorse with the victims, Randy meets with a shooting survivor.

Mildred Muhammad, ex-wife of the infamous DC Sniper, reveals how the man she loved disintegrated into a monster; Melissa Moore interviews Lee Boyd Malvo in prison.

John Wayne Gacy's sister reveals intimate details of the killer, and returns to her childhood home in Chicago with her daughter

Amber and Michelle Yates--daughters of serial killer Richard Yates--tell the inside story of being raised by a man who terrorized the city of Spokane, Washington.

A woman discusses how her childhood sweetheart turned into a murdering rapist; being a child of a serial killer.

Melissa Moore--daughter of Keith Hunter Jesperson, infamously known as the "Happy Face Killer" tells her own personal story as the daughter of a serial killer.

Drew Peterson's eldest son recounts his experience raising his half siblings in light of his father's arrest, as well as his personal journey from denial to acceptance of the fact that his parent is a murderer.

Richard Beasley was a conman and serial killer who posed as a preacher and in 2011, posted advertisements on Craigslist to entice men to work with him on his farm.