Assassination Trivia

[BettyO]

According to May, he was "called upon by Government Detectives", and summoned to appear before a "commission of high functionaries of the government"; one of whom was Colonel Lafayette Baker. May claimed that he was summoned because it was known that he had operated on JWB to remove the tumor on the back of his neck. Booth had went to May's office with unnamed "Friend." Does anyone know who this friend was, who accompanied Booth to May's office? Could he have told Federal officials about the scar?