Godfather

From SA Mafia Wiki

The Godfather is the de jure leader of a Mafia group. Godfathers are generally immune to Cop investigations; any Cop who investigates the Godfather will receive a result of Innocent or TOWN.

As the leader of the Mafia, the Godfather is usually in charge of coordinating the actions of his fellow Mafia members, including final decision of the nightkill target and (if applicable) which Goon is responsible for making the kill. Usually the Godfather will have a chain of command that goes into effect if he dies; the new Mafia leader does not inherit the Godfather's investigation immunity, simply the last word over the nightkill.

The possible presence of a Godfather is often used to cast doubt on Cop investigations that return a town result on a scummy player. On the other hand, sometimes Godfathers play somewhat scummy on purpose in order to draw a cop investigation which they then use to clear themselves by night-killing the cop and confirming his Sanity.

Other scum roles that are investigation-immune are often called "godfathers", or have a "godfather" ability. Serial Killers are an example of another role that often has investigation immunity.