"My own true feeling is, I think the wrong character killed himself," McGee told the Web Site TelevisionWithoutPity.com Thursday.
McGee said Leary, who declined an interview request, was a controlling person who hogged the spotlight, yet wanted to avoid confrontations. He said Leary didn't discuss with him the decision about the suicide of his character, fire Chief Jerry Reilly.
"His persona would make you think he's straight up, he's honest and he's forthright," McGee said. "But I never got an indication of that."
Peter Tolan, writer and co-producer for the FX drama, offered a different version to TelevisionWithoutPity.com.
"Jack is being disingenuous if he says nobody explained to him what was going on," Tolan said in a statement. "The difference he's drawing is, apparently he wanted to hear (the bad news) from Denis, when the fact remains that Denis is wearing about eight different hats on the show and doesn't have anything to do with the hiring and firing of actors."