'Very good out of the box questions, Justy Thoughts'..
As we all know there is precedent for this. If a person wants to excel at any profession or craft, it would be reasonable to conclude that they would seek information pertaining to this trade.. Whether it be James Patterson; fictional, or Ann Rule; true crime, much info could be dwelved from these books as well as TV shows such as CSI, criminal minds, discovery ID, etc.
The occasional male victim would also be a possibility due to his prison stint and obvious negative feeling toward "authority figures", because of their abuse of power that he perceives.