After Jeffrey Locker's family reported him missing, New York City police discovered the body of the Long Island businessman and motivational speaker slumped over the steering wheel of his car in Harlem.
The 1993 murder of Tricia Pacaccio near Chicago is investigated as are two other slayings and a brutal attack near Los Angeles. The crimes were allegedly committed by Michael Gargiulo, who knew or lived near all four victims.
The 1969 murder of 15-year-old John McCabe in Massachusetts is investigated. The victim never returned home after attending a Knights of Columbus dance. His body was found the next day in a vacant lot.
The case of millionaire businessman Dino Guglielmelli, who sought to have his estranged wife, former model Monica Olsen, killed. The murder-for-hire plot didn't work as expected, however: the man he asked to do the deed went to the police, instead.