Deputies and Florida Highway Patrol troopers supervised crews for more than two hours Monday, as they worked to bring a submerged car and it's driver to the surface of Choctawhatchee Bay.
Two witnesses saw the car go into the bay around 10 Monday morning.
"They stated they saw a car that ran off the road that was traveling southbound on the 331 bridge. He actually veered into the north bound lane of traffic and the vehicle dove into the water,” said Catherine Rodriguez, Public Information Officer for the Walton County Sheriff’s Department.
Authorities found the car in 11 feet of water.
Paramedics took the driver to Sacred Heart Hospital, where doctors pronounced him dead.
He was the only person inside of the car.
The big question is why?
"We don't know at this time, we do have some witness statements,” said Rodriguez. “But right now we don't want to speculate. We don't know if it is medical or what. We just don't know at this time."
Authorities are hoping an autopsy will provide those answers.
Walton County authorities are examining the car for clues.
The Highway Patrol is handling the investigation.