Mafia 40. In the Name of the Emperor

Due to recent events, the intelligence report will be delivered personally to the members of the first company, Captain. End of transmission.

What could be the Mafia's motivation for writing something like this? To make us think that the Mafia died yesterday and to rule out their possible role until the end of the game? I can't think of anything else.
But if the note is true, who could Arandor have been?