Secret double lives of the killers among us exposed.

In 1989, in peaceful Dryden, New York, a Christmastime massacre claims an entire family. Just when it seems the horror has passed, terror visits Dryden again. With these events, a so-called "curse" will descend on Dryden for ten years.

Learn more about Alice Crimmins and the time period in which she lived.

The story behind Truman Capote's classic In Cold Blood when the four members of the Clutter family are brutally murdered, detectives mount a nationwide search for the killers and face the chilling prospect that they died for no reason whatsoever.

Key Biscayne, FL, 1964: 40-year-old Candy Mossler finds her multi-millionaire husband, 69-year-old Jacques stabbed to death in their apartment. Detectives are swept into a twisted tale of incest, secret homosexual liaisons, and money, money, money...

Key Biscayne, FL, 1964: Candy Mossler finds her multi-millionaire husband, Jacques, stabbed to death in their apartment. Detectives are swept into a twisted tale of incest, secret homosexual liaisons, and money, money, money...

In 1965 Alice Crimmins' children suddenly go missing in the night and turn up dead, leaving her New York neighborhood wondering who did it. Series premieres Tuesday November 12 at 10/9C. Only on Investigation Discovery!

1968: When a local reporter receives a mysterious phone call from a murderer who threatens to kill again, Gaffney police must race against the clock to try to save the town's teen girls.

1966: It starts with a simple knock on a bedroom door, and begins one of the most infamous mass murders in American history. A strange man enters the home of nursing students and systematically tortures, rapes, and murders eight young women, then disappears into the night. The investigation follows a series of wild twists and turns as police coordinate a citywide dragnet to capture one of the most violent criminals in history before he strikes again.

Live Oak, FL, 1952: The revered Dr. Leroy Adams has been shot in his office. In a time of segregation and secrets, figuring out who is responsible may not be as easy as simply identifying the killer.

Learn more about the "Career Girls" and the time period in which they lived in.

In 1967 a series of young female co-eds from Michigan universities are murdered one by one in horrible ways.

Live Oak, FL, 1952: The revered Dr. Leroy Adams has been shot in his office. In a time of segregation and secrets, figuring out who is responsible may not be as easy as simply identifying the killer.

Kew Gardens, Queens, 1964: Kitty Genovese is raped and stabbed to death outside her apartment building as her neighbors watch and do nothing, introducing America to the bystander effect. But is this really the whole story...?

Learn more about the Chillingworth's and the time period in which they lived in.

When Kitty Genovese is stabbed to death outside her Queens apartment building, her case is treated like any other murder. But when police search the area, they’re surprised to find that many people heard or saw something. Yet the stories don’t match.