(Gresham, OR)  --  Police are investigating, after a homeless man was found dead after being hit by a car in Gresham.  Authorities were told the 58-year-old man had been lying in the roadway in the 15-hundred block of Northeast Burnside when he was run over by a Volvo sedan around 3:20 yesterday morning.  There's no word yet on whether the man was alive when he was hit.  Police say the driver of the sedan stopped and cooperated with the investigation.