I was thinking more of a build up of animosty towards privileged kids, gorgeous, living the less strictured college life, maybe to the envious outsider seeming like no work was ever done. Taking out $50 k+ loans, then some fanatic, cult creep, notes those loans have poofed and is convinced by media that HE is paying for all this!
i don't think K had her used car long enough to attract any attention of the kind I'm referring to.
iMO it is not a serial killer (unless he really liked it and starts off a spree). Also, jmo, it was not jealousy from anyone the kids dated. It was long time festering class envy, someone who hated college kids as a whole, and was goaded into murder by resentment stirred up by fringe media, or it could have been a religious cult fanatic disapproving of everything this kids represented.
But I don't let spurned faculty off the hook.
Imo