In January 2003, Susan Wright stabbed her husband Jeff 193 times, later claiming that she snapped after suffering years of physical abuse from him.

Christian Longo brutally murdered his wife and three young children in 2001 — all because he was trying to cover up his financial difficulties and fraudulent lifestyle.

Union Army Major Henry Rathbone spent his life wracked with guilt after he wasn't able to stop John Wilkes Booth, causing his mental health to eventually deteriorate so much that he murdered his wife in 1883.

Danny Casolaro was investigating a number of conspiracy theories involving everything from Ronald Reagan's election to the Iran-Contra affair when he was found dead under strange circumstances on August 10, 1991.

In November 2004, 21-year-old Christopher Porco chopped up his parents as they slept in their bed, leaving his father dead and his mother missing an eye and part of her skull.

Beginning in 2010, investigators uncovered 16 corpses — mostly young women — who had been killed over a period of at least 14 years and discarded across New York’s Gilgo Beach. Authorities believe that they may have been victims of the mysterious Long Island Serial Killer.

On May 31, 2014, sixth graders Morgan Geyser and Anissa Weier tried to murder their friend Payton Leutner in the woods of Wisconsin — to please Slender Man.

Yetunde Price was the loving half-sister of tennis champs Venus and Serena Williams — but then she was suddenly killed in a drive-by shooting in 2003.

In 2016, Kala Brown was chained up for two months inside a homemade prison made by serial killer Todd Kohlhepp, also known as the "Amazon Review Killer."

Tilly Devine started out as an impoverished sex worker in the London slums before she moved to Australia, opened a string of successful brothels, and became one of the most violent crime bosses in Sydney.

Dubbed the "Girl in the Closet," Lauren Kavanaugh was isolated and abused mentally, physically, and sexually by her mother and stepfather between the ages of two and eight.