LEWISTON, Idaho (AP) — A northern Idaho man convicted of murdering his adoptive parents in the late 1980s was released on parole Thursday after serving nearly 22 years behind bars.

Bradley Ryan Thomasson, 39, was ordered to remain within a four-county region in southwestern Idaho and not to contact the extended family of his victims under the terms of his release on parole, The Lewiston Tribune reported.

Thomasson was a 17-year-old high school senior when he shot Judith Ann Thomasson, 50, and Ray E. Thomasson, 57, on Sept. 22, 1989 at their Lewiston home, police said. The teen initially told police he had argued with his parents over the use of the family's car.

During the alleged argument, Thomasson said his father started hitting him. The teen told police that's when he picked up a .22-caliber rifle and pointed it at the man, who responded: "I don't think you have guts enough," Thomasson told police.

"And I pulled the trigger," the teen said during a recorded interview with officers that was later played in court.

Thomasson told police he then went into his parents' bedroom and shot his mother. But authorities reported that evidence found in the home conflicted with Thomasson's story, and blood stains indicated both the mom and dad were shot in their bed.

Bradley called police earlier that morning to report he had found the bodies after spotting an intruder leave the house. The teen changed his story later that day.

A jury of 12 women was selected from Ada County for the trial in northern Idaho and deliberated for about two hours before finding Thomasson guilty in 1990 of first-degree murder in the death of his parents. He was ordered to serve 10 years to life in prison for each of the deaths, with the sentences to be served consecutively.

Matthew Thomasson was also adopted by the Lewiston couple, though he was living near Tacoma, Wash., at the time of their deaths. He expressed disappointment with legal system Thursday after his adopted brother was released from prison.

"But we knew the day would come eventually," said Matthew Thomasson, of Lewiston. "I hope that he has learned something while he was in there. We really have nothing to do with him. I'm hoping for the best. I hope things work for him."

Bradley Thomasson will be on parole for at least five years.