(Portland, OR)  --  An inmate who escaped from the Columbia River Correctional Facility with only days until his scheduled release is now facing an additional two-and-a-half years behind bars.  Matthew Medlin scaled a fence to escape from the facility early Wednesday afternoon, but was tracked down and taken back into custody at a Portland Jack-in-the-Box restaurant Wednesday night.  Officials say Medlin, who was serving time for burglary, sex abuse, and assault, was due to be released on May 6th.  He pleaded not guilty yesterday to a felony charge of second-degree escape.