URL: ( http://en.wikipedia.org/wiki/Clarifications#Plot )
"The suspect is most likely a white male in his late twenties to late thirties, who is not a college graduate, but feels superior to those with advanced education, and is likely employed in a bureaucratic entity, possibly civil or public service. They continue that he has a problem with authority and a deep-seated resentment for those that have impeded his progress professionally. The sexual nature of the killings is thought to be a secondary motivation and the lack of DNA or saliva in the bite marks suggests possible postmortem staging. The suspect is described as struggling with lasting relationships and potentially a high functioning alcoholic with alcohol being used as a trigger in the crimes. Finally they speculate that the suspect’s apparent resentment of the homeless may indicate a previous personal relationship with a homeless person or the targeting may simply be an opportunity for the killer to assert his superiority and intellectual prowess."