Vigilante vaxxers
The Columbo in me says start with the school nurses. They have the means, and if you've talked to any of them lately, they are very angry at the unvaxxed.
Killer tits on that one.
She still loves her daddy
Carfentanyl was most likely designed for these types of attacks. Those that have pain that sometging 10x more powerful than heroine can't relieve aren't going to be any better with something 100x heroine. They'll be dead.