Gilgo Beach: Hiding in Plain Sight - Go inside the mind of Rex Heuermann

Alleged Long Island serial killer Rex Heuermann is charged in the deaths of three Gilgo Beach victims and is considered the prime suspect in a fourth killing. Officials as far away as Las Vegas are investigating if Heuermann is connected to more cases. So how did a seemingly normal family man allegedly lead a double life?
"Gilgo Beach: Hiding in Plain Sight" premieres tonight at 9:30 p.m. on an all-new episode of "Crime Files."