Academic success perhaps. The killer and Nuno Loureiro, the MIT professor he killed, were in the same class at Instituto Superior Técnico (Portugal's leading engineering school). Loureiro had a distinguished career at MIT while the killer was homeless.
Maybe he had some idea that his buddy ran away with and he attributed his success to his idea, while he was homeless? There was a whole TV show around a similar idea (Breaking Bad).
Im pretty certain that of plagiate software would include rejected students works whole swaths of the academic successful would be let go.
What were you actually trying to type? I can't figure it out.
Jealousy is really the sickest of sins…
The medieval RC Church (proudly) taught that "Superbia mater malem est", "Pride is the mother of evil".