SEATTLE -- Paul Rimbey, a former car salesman at Huling Brothers Auto Center in West Seattle, was found guilty Thursday of first-degree theft.

“He deserved it. If he took the car away from me and put it into his name, I never gave him permission for that,” Richard Grey said.

According to court documents, Rimbey sold a truck to Grey, 60, a mentally ill man, and then convinced Grey to sign a contract giving ownership to Rimbey if Grey could not pay impound fees.

“Dirty shame, it’s a dirty trick they would do that,” Grey told KIRO 7 Eyewitness News.

According to an investigation by state troopers and Seattle police, Grey, who was wearing pants covered in his own urine and feces, walked into the dealership with a bag of cash and purchased the truck at the $30,000 maximum price in July 2006.

Within days of the purchase, Grey was hospitalized at Harborview Medical Center in Seattle and his truck was impounded.

While in the hospital, Rimbey visited the man and convinced him to sign a contract, giving ownership to Rimbey if the man could not pay $1,200 in impound fees.

“He knew I was sick. He took advantage of me, he knew I was sedated,” Grey said.

Meanwhile, two other Huling Brothers employees broke into the Grey’s home and stole $70,000 cash.

Grey testified in court that he knew what he was doing when he signed the contract.

According to prosecutors, Rimbey scammed the man by taking advantage of his mental state.

In all, police said 11 dealership employees were involved in victimizing the man.

Police said the Huling Brothers dealership cooperated with the investigation and reimbursed the victim the $30,000 he paid for the truck.