The driver of a car that struck and killed a pedestrian has been arrested on suspicion of manslaughter, Tucson police said on June 17.

Byron Omar Calderon, 36, was arrested and booked into the Pima County jail, after detectives determined that he was impaired, police said.

Officers were called at 11 p.m. June 16 to an accident involving a pedestrian on East Grant Road near North Mountain Avenue.

Tucson Fire personnel were rendering aid to the pedestrian, but he was pronounced dead at the scene.

Detectives learned that the man was crossing the eastbound lanes of traffic on Grant when he was struck by a 2012 Dodge Challenger that was eastbound in the center lane.

The pedestrian was not crossing in a crosswalk, police said.