For the first time, Douglas produced scientific evidence about how to link what is left at a crime scene to what is going on inside a perpetrator's mind. As boys, many wet the bed, set fires and torture small animals. They usually begin acting out the fantasy in their early 20s. The signature doesn't change. It's something he needs to do.
Serial killers feel no remorse.
They tend to visit the original murder site and their victims' graves. They are police buffs and often spend time socializing with cops at their hangouts. Their vehicle of choice used to be the Volkswagen Beetle. One of his biggest coups was helping law enforcement officials catch and prosecute Wayne Williams in 1982 for a series of brutal murders of black children in Atlanta. Douglas correctly described the killer as a black man who drove a police-style car and enticed his victims by promising to help them launch a musical career.