Karic was essentially Giuliani's bodyguard (technically his chauffeur) as a New York City police officer, when Giuliani was the US attorney for the Southern District of New York.
When Ruby Giuliani became mayor of New York City, he appointed body carry to deputy commissioner of the New York City Department of correction, then to commissioner of the New York City Department of correction, then to commissioner of the New York City Police Department.
Bernie Karrick is lucky that he was never indicted for corruption from his service with the New York City Department of correction.