Mikey, Thief can be either alignment, and the fact you're using Miller as a modifier of sorts just makes it seem even more fishy. We have 2 people basically confirming that you stole something, so your Thief claim stands up.

Logically, you're the best option right now, until others have spoken with any other possible info they might have. If you're Inno, Nemesis is basically confirmed Mafia.