15. Dean Arnold Corll, the "Candy Man"/"Pied Piper"
In Houston, TX, Dean Arnold Corll was affectionately known as the "Candy Man," since his family owned a candy store and he often gave local kids free pieces of candy. Unfortunately, that's not all he was giving Houston's youngsters.
Along with his much younger accomplices David Brooks and Elmer Wayne Henley, Corll—in his early 30s—spent the years from 1970 to 1973 abducting, raping, and killing at least 28 little boys. The victims ranged from 13 to 20 years of age, and Corll would coax them into either Ford Econoline van or Plymouth GTX by telling them he knew about a party or that he would give them rides to their homes. If they resisted, he'd grab them, trick them into putting on handcuffs, or force drugs into their system. Sometimes, he even made the kid call his parents to tell them that he was OK, just to make sure that they didn't worry.
As for the killing methods, Corll would strangle some victims and shoot others with a .22 caliber pistol. Their bodies would then be wrapped up in plastic and buried.