Joachim Kroll, the "Ruhr Cannibal," terrorized West Germany for over 20 years, eating the flesh of his victims because "meat was expensive."Michael Dahlke / WAZ FotoPoolJoachim Kroll reenacts one of his murders for police, demonstrating how he overpowered his victim. While not nearly as well known as Ted Bundy or Jeffrey Dahmer, Joachim Kroll’s crimes are equally, if not more, disturbing. Known as the Ruhr Cannibal, the Ruhr Hunter, or the Duisburg Man-Eater, Kroll’s macabre killing spree took the lives of 14 known victims — and authorities believe he killed even more.

The USS Scorpion vanished 400 miles southwest of the Azores on May 22, 1968. Then, the Navy kept key information from the missing crew's family members for years.Wikimedia CommonsThe USS Scorpion was the last American submarine to go missing. Since the end of World War II, the United States has only lost two nuclear submarines: the USS Thresher and the USS Scorpion. The Thresher sank during deep-diving drills near Cape Cod, Massachusetts, in 1963, killing all 129 crew members on board.

With just his mouth, Prince Randian could roll cigarettes, light them, and even shave his face. He went by many names, including “The Snake Man,” “The Human Torso,” and “The Human Caterpillar.” But no matter what he went by, when the curtain opened and the spotlight fell upon Prince Randian, there was no doubt that the audience was unprepared for what they saw. Standing under three feet tall, Prince Randian was certainly a shocking sight.

Jeffrey Dahmer's mother struggled with mental illness while raising her son and never recovered from the guilt once his crimes came to light.Joyce FlintJeffrey Dahmer’s mother Joyce Dahmer along with Jeffrey (left) and her other son, David. When society tried to comprehend the case of Jeffrey Dahmer, the cannibalistic serial killer convicted of murdering 17 boys and men from 1978 to 1991, criminologists turned to his mother, Joyce Dahmer, for insight.

Eric Harris allegedly shot Columbine victim Rachel Scott because she said yes when he asked her if she believed in God — but the evidence doesn't support this claim.NewsChannel 5/YouTubeWhile Rachel Scott was eating lunch on the lawn of Columbine High School on April 20, 1999, Eric Harris shot her dead — making her the first victim of the Littleton massacre. Rachel Scott had big dreams for herself. The enthusiastic 17-year-old from Colorado wanted to become an actress or perhaps a missionary.