Okay, everyone has posted now. Nobody has claimed to be attacked. As such, the doctor did not heal someone from a kill last night. Flower was pirated and I was jailed. These are actions that we get notified of at the start of night, which automatically removes us as the mafia killer because we're obviously not going to perform the faction kill when we know we can't. Zolo's action failed on me but it wasn't a kill or else I would have been notified that I was attacked. This leaves two possibilities: mafia hit an immune player who's not claiming the attack or Tris is the mafia killer.
@Kawaii claim your role.