A West Linn police detective listening to recorded jail phone calls uncovered a scheme in which a Clackamas County inmate and his girlfriend forged documents to sell an impounded car whose registered owner had died.

Isaiah Andrew Mohr, 30, was sentenced Thursday, Aug. 13, to 24 months in prison after a jury found him guilty of first-degree forgery and identity theft in Clackamas County Circuit Court, according to Clackamas County.

Mohr had been arrested in April on charges of mail theft, eluding police and other crimes and was being held at the Clackamas County Jail. While locked up, he hatched a plan in June to raise bail money by selling a car his cellmate had been driving at the time of the cellmate's arrest. The car did not belong to the cellmate. It had been impounded by the Clackamas County Sheriff's Office.

A joint investigation by the West Linn Police Department and the Sheriff's Office determined Mohr conspired with his girlfriend, Adriane Shelton, 47, to forge a bill of sale for the vehicle. On June 12, Shelton walked into the Sheriff's Office and presented the forged document as proof of ownership, claiming she had purchased the car from a man in March.

The detective monitoring calls between Mohr and Shelton caught the pair discussing the plan and alerted the Sheriff's Office before the vehicle could be released.

Investigators later discovered the car's registered owner, a woman, had died in December 2025, meaning no legitimate transfer of title was possible through the people involved.

Shelton faces charges of forgery, identity theft and criminal conspiracy. Her trial date has not been scheduled.

What's next: Mohr still faces trial on his original charges of mail theft and eluding police, set for Sept. 22 in Clackamas County Circuit Court.