I would guess yes. Why? Because he was kidnapping Cosa Nostra made men and holding them for ransom. The Mafia had to know he meant business if they didn't pay up. Therefore I would wager that Mickey Spillane was a killer, but I have nothing to back that up. Nothing.
"For us, rubbin'out a Mustache was just like makin' way for a new building, like we was in the construction business."
