(Salem, OR)  --  Police are searching for a prison inmate after he allegedly stole a dump truck and escaped.  Police say 32-year-old Kameron Bowen walked away from the Santiam (SAN'-tee-am) Correctional Institution in Salem yesterday and drove off in a stolen Department of Corrections dump truck.  He was last seen driving east on the Aumsville Highway yesterday afternoon.  Bowen was serving time for Identity Theft, Theft and Unlawful Use of a Weapon.