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In Chapter Four of the Bible, Cain kills Abel. It is the world's most famous murder. But the Bible is silent about one key detail: the weapon Cain used to kill his brother.

In 1932, Mitchell Siegel was killed by three gunshots to his chest. While mourning, his son dreamed of a bulletproof man and created the world's greatest hero: Superman. And like Cain's murder weapon, the gun used in this unsolved murder has never been found... Find out more