This information can be found in Sexual Homicide Patterns and Motives, page 29, written by R. Ressler, A. Burgess, and J. Douglas. These three executed a study involving 36 incarcerated serial killers, and compiled the data collected into a chart of childhood behavior traits among serial killers. Can be of high income or low income. Average to high intelligence. Usually married with children and has a career.
Serial killers enjoy extending the suffering of their victims.
They get a lot ow power by determining whether their victim will live or die. They may torture their victim for several days to obtain as much pleasaure as possible. Victims of serial killers have no profile. Most victims are chosen at random, just being in the wrong place at the wrong time. Unlike mass murderers, serial killers select the victim.