When Adam Rainer turned 18 he was under four and a half feet tall. A little more than 15 years later he would be 7'1" — tall enough to be classified as a giant.

Colleen Stan became known as the "girl in the box" after she was held prisoner by Cameron and Janice Hooker inside their California home between 1977 and 1984.

In July 1951, Mary Reeser mysteriously burned into a pile of ashes in her Florida home, but the apartment around her suffered almost no damage, leading to theories that she had spontaneously combusted.

Christopher Scarver didn't like fellow inmate Jeffrey Dahmer's sickening crimes — so on November 28, 1994, he did something about it.

Mary Jane Kelly was an enigmatic figure with a mostly unverified story. What was clear, though, was the horrifying nature of her murder.

After fleeing Nazi Germany in 1938, William Hitler became an American citizen, changed his name to William Stuart-Houston, and joined the U.S. Navy, where he was awarded a Purple Heart during World War 2.

Mel Ignatow killed his girlfriend Brenda Sue Schaefer in 1988 and managed to get away with it. Two decades later, however, he met a grisly fate eerily reminiscent of that murder.

Tom and Eileen Lonergan went on a group scuba diving trip to the Coral Sea in January 1998 — before they were accidentally abandoned and never seen again.

One of the most calculating serial killers in British history, Graham Young started poisoning his victims when he was just 14 years old and kept a meticulous diary of his crimes.

An infamous punishment used to maintain order at sea in the 17th and 18th centuries, keelhauling was when sailors would be dragged under ships as punishment.

Operation Anthropoid, a secret plan to kill Reinhard Heydrich in 1942, was the only successful assassination of a top Nazi officer during World War II.