(CNN) -- For decades, criminologists and true crime documentaries have attempted to understand what causes serial killers to commit the atrocities they do. Dennis Rader, John Wayne Gacy, Jeffrey Dahmer, Albert DeSalvo and Ted Bundy are just a few of more than 3,600 serial killers documented ...
In his confession, he admitted, "I picked prostitutes as my victims because I hate most prostitutes and I did not want to pay them for sex." Filed under: Gary Ridgway Graveyard Shift Unscripted Crime 21 MORE LISTS Before They Were Killers ...