You've either heard of them, did research about them or your parents probably used them as ploys for you not to go out but either way you'll know them better now! Halloween is closer than we think and we need a few readers shaken with chills on what they'll discover as they read about The World's Notorious Serial Killers! No Fact or Fiction because we all know these are major FACTS that'll have your creepy factor going WAY up! Even for tou sickos! We also have pictures! (All Credits to Ranker Crime) Enjoy!