The Incidence of Child Abuse in Serial Killers from Heather Mitchell and Michael G. Aamodt is a very interesting read on the subject.
"Abuse of all types excluding neglect was significantly higher in the serial killer population. For serial killers, the prevalence of physical abuse was 36%; sexual abuse was 26%; and psychological abuse was 50%. Neglect was equally prevalent in the serial killer (18%) and societal norm populations."
Thank you for the citation! Id like to quote that in my next article.