That might suggest it was indeed a loner, a rogue scientist with a grudge which has now been satisfied.

BBC: Decontamination workers outside US Capitol

Paul, who was found living in a children's home, looked so pained way back then, so deeply unsure of himself, that it was almost painful to watch him speak, and hard not to see him as a loner-to-be.

WSJ: Film Review: Life, Not by the Numbers by Joe Morgenstern

Keith was a loner who was often bullied and the older he got, the more difficult he found it to accept the teachers' authoritarian rule.

CNN: Rolling Stones celebrate 50 years of raucous rock'n'roll