Humans are capable of performing extremely gruesome acts, far more heinous than just murder. Just take a look at the number of murderers and serial killers in the world. But serial killers are far more inhumane than the murderers. In most cases, there is no logical reason or personal vendetta against the victim but just a psychological urge to kill. To fulfill this urge they often go to great lengths and apply various tactics so as to avoid being caught. Here we have brought together the stories of ten such serial killers whose cunning tactics will give you the chills.