It was back in 1955, but Willie Bioff got blown up by a car bomb.

Years before, he testified against the Chicago mob- Nitti, Roselli, Ricca, etc... and then went into witness protection. For some unexplained reason, he got a job at a casino working for Gus Greenbaum and blew his cover.

You shit-kicking, stinky, horse-manure-smelling motherfucker you! If you ever get out of line over there again, I'll smash your fucking head so hard you won't be able to get that cowboy hat on. You hear me? Fucking hick. -Nicky (Casino)