“Germ war game?
Manchurian bio-terrorist patsy?”
*****
Whack job drug addict would be my guess, but if he jabbed several people, then he came with a plan to do it. But, who knows. Weird story.
I watched this guy assassinate an informant by stabbing him with a needle in “The Kids Who Knew Too Much” when I was a kid and it had a profound effect on me:
https://youtu.be/7pc-YWYPQwk?t=138