SALEM – A former Peabody man recently released from prison after serving a six-year prison term for strangling his former girlfriend in 2002 is back behind bars after being convicted on new charges and failing to abide by the terms of his probation.Nathan A. Osborne, 31, appeared Monday morning in Salem Superior Court on a probation violation.Probation officer Miriam Gillardo told Judge John T. Lu that she, defense lawyer Lynette M. Leos and the defendant reached a stipulation to the violation.Gillardo said Osborne was released from state prison last January and he failed to abide by the five-year probationary terms by failing to enter and complete a batterer’s treatment program, undergo random drug screenings and was arrested on new charges out of Salem District Court.Those charges involving uttering, larceny, receiving stolen property, fraud and a motor vehicle offense concerning two incidents in which he ripped off his new roommate and a boss.He pleaded guilty to the offenses in December and received a two-year jail term for those incidents.Gillardo asked Lu to find Osborne in violation and sentence him three-to-four years in state prison on the 2002 case.Lu agreed and imposed the sentence, which is forthwith, wiping out the two-year jail term he is now serving for the convictions out of Salem District Court.In the 2002 case, Osborne was charged with attempted murder after choking his then 20-year-old ex-girlfriend in her home on Esquire Circle in Peabody.The victim lost consciousness for a time and told authorities she “thought she was going to die.”The two had a two-year relationship and a daughter together.Following the incident he fled in her 1995 white Honda Accord and stole her pocketbook containing $400.He drove to Holten, Maine and turned himself into police the following morning.The judge agreed to credit Osborne the 146 days he has spent awaiting disposition on the probationary violation.