Cold Case Murder Mysteries

A harrowing discovery was made on Halloween morning, 1975, when 15-year-old Greenwich, CT resident Martha Moxley was found bludgeoned to death underneath a tree in the family's backyard. It soon became apparent a monster was lurking somewhere in the shadows of a wealthy, gated community, but more than four decades later, we're still asking one pertinent question. Who really killed Martha Moxley?