(Salem, OR) -- A man who was mistakenly released from the Marion County Jail is back behind bars. Police say 30-year-old Salvador Guido Ledesma was arrested without incident yesterday after someone spotted him in downtown Salem and called 911. Ledesma had been convicted of sex abuse and rape and was in jail while appealing his case. He was released on November 22nd, because of an administrative mistake. The Marion County Sheriff's Office didn't realize Ledesma had been released until November 30th. An investigation is underway to determine how a future accidental release of an inmate can be prevented.