Yeah. After his vanilla claim, I don't think he could be town.
Aight, but why would the scum go by this plan? In this case Marimo. He blocks me. Maybe he can do that because he is a mafia roleblocker. So I won't be able to invest him. What is stopping Marimo from doing the faction kill? It might indeed put some sus on him, but there is still the possibility that Marimo is a town roleblocker.
If the faction kill happens and I was blocked, the last scum should be you or Marimo.