State troopers say 28-year-old Andres Chiquival was driving the car that ran off Mitchell Mill Road and collided with a guardrail before going into Watkins Pond on Thursday morning.
Rescuers recovered his body in the passenger side of the vehicle.
Troopers say he was not wearing a seat belt and believe speed was a factor. They are looking into if he was impaired at the time of the crash.