-ordered (or at least tolerated) the death and mutilation of an "innocent" hooker
Lol. Who cares, she was just a .. oh I'm sorry. But we don't know if Michael was behind that, more likely Tom or Neri.
Of course Michael knew about the hooker. And even if he didn't, as Boss, he's still culpable for her murder, both legally and morally.
All right, forget the morals part, he's a fucking gangster
. But he's still responsible for her death.