That's one reason I was picturing someone of grad student age - because several other university related crimes have had to do with long term grad student status. This guy got his master's from DeSales, a Catholic university with a physical campus in PA, and many online courses.
He leaves his job at the school in Spring 2021 (in PA).
Probably arrives Pullman Fall 2021 - and one year later, commits mass murder. Flees back to PA.
Was he in fact a Bundy fan? There are eerie similarities, for sure. This guy (IMO) knew that his mind was disordered and he was obsessed with planning and thinking about crime. He turned that obsession into an attempt at a career (in criminology!)
He's like very smart, very analytic, methodical and (of course) insane. I hope I can use that word. I am not diagnosing him with anything, but I need some word to stick in there that denotes "out of his ever-lovin' mind" which is too long to type.