Gregory Lane Lanier, 35, told police in Sebring he thought the 9mm Beretta semi-automatic handgun on the floor of his pickup truck was unloaded when the black and tan English bulldog kicked it and caused it to fire.
Police in Sebring said they were sceptical, adding there were “some indications” that Mr Lanier may have made his story up.
“It’s what he claims,” Commander Steve Carr, a police spokesman, said of Mr Lanier’s account.
“We didn’t spend a lot of time investigating it,” he said. “There doesn’t appear to be any criminal act involved. You don’t have to be licensed in Florida to carry a handgun.”