The victim who inspired the AMBER alert system, nine-year-old Amber Hagerman was murdered after being abducted while riding her bike in Arlington, Texas on January 13, 1996.

Erik the Red is perhaps best known as the father of Viking explorer Leif Erikson, but he also established the first known European settlement in North America — and it was all because of his violent temper.

West Virginia teens Shelia Eddy and Rachel Shoaf stabbed their best friend Skylar Neese to death on July 6, 2012 — simply because they didn't want to be friends with her anymore.

A small-time hustler from Vancouver, Paul Snider thought he'd struck it rich when he met model Dorothy Stratten — but when she left him, he killed her.

On May 15, 1972, Arthur Bremer shot presidential candidate George Wallace five times at a Maryland rally. And once his diaries were published while he was behind bars, it became clear that he also wanted to assassinate Richard Nixon.

Although there was virtually no evidence against him, Richard Glossip was given the death penalty for the 1997 murder of Barry Van Treese — and he was convicted based on the murderer's word alone.

After John Edward Jones got stuck inside Utah's Nutty Putty Cave and died there in 2009, it was closed for good — with Jones' body forever sealed inside.

Shanda Sharer was an ordinary Indiana teenager in 1992 — until four girls tortured her for hours before finally killing her.

With World War II nearing its end in the early months of 1945, hundreds of Japanese soldiers perished during the Ramree Island crocodile attack, the deadliest in recorded history.

"I was searching for the perfect mate," Nannie Doss told police, after she was arrested for murdering her husbands. "The real romance in life."