It happened around 12:30 Sunday morning on 4900 block of New Falls Road in Middletown.
Officers tell Action News 26-year-old John Rearick was walking when he was struck by a car and left on the roadway. Rearick sustained serious head injuries and was taken to St. Mary's Medical Center in critical condition.
Police say they are looking for a red or maroon colored vehicle with car damage. A red Cadillac was also reported at the scene but it's unknown if the vehicle was involved in the crash.
The area where the accident occurred is a well travelled roadway and authorities believe someone may have saw something.
Anyone with information on the vehicle or the driver is asked to contact the Middletown Police Department.