A Mafia Godfather hires a deaf bookkeeper, because a deaf bookkeeper can't hear anything he might have to testify about in court. The Godfather finds out his bookkeeper cheated him out of 10 million bucks.
The Godfather's lawyer knows sign language, and both pay the bookkeeper a little visit about the missing $10 million. The Godfather tells the lawyer, "Ask him where the 10 million bucks he embezzled from me is." The attorney signs to the bookkeeper, asking where the money is.
The bookkeeper signs back, and the lawyer translates, "He doesn't know what you're talking about."
The Godfather pulls out a pistol, puts it to the bookkeeper's temple and says, "Ask him again!"
The attorney signs to the bookkeeper, "He'll kill you if you don't tell him!" 
The bookkeeper signs back, "OK! You win!  It's in a brown briefcase buried by the shed in my cousin Enzo's backyard!"
The Godfather asks the attorney, "Well, what'd he say?" 
The attorney replies, "He says you don't have the guts to pull the trigger."