With a total of 49 confirmed murders, Gary Ridgway, otherwise known as the Green River Killer, is one of the most prolific serial killers American history;
A former Texas music teacher and choir leader, Marshall Applewhite was the founder of Heaven's Gate, a religious group which organized the largest American mass suicide since Jonestown;
A mathematical prodigy and former professor at Cal Berkeley, Ted Kaczynski became widely known as the Unabomber, after mailing bombs to universities and airlines, between 1978 and 1995;
From All-American to murderer, Aaron Hernandez's early career success at tight end for the New England Patriots becomes shockingly overshadowed by his violent life as a killer; Hernandez is charged with the first-degree murder of friend Odin Lloyd;
Pregnant 18-year-old Melissa Drexler gives birth to her son in a bathroom stall during her prom; the miraculous moment turns into murder when the teen suffocates the child, wrapping him in a plastic bag and discarding her baby in the trash.
Whitey Bulger is one of the most prominent figures in Boston's organized crime scene; from 1975 to 1990, Bulger serves as an informant to the FBI and tips off police of other crime families, while simultaneously building his own crime network.