A federal judge today sentenced a 70-year-old resident of the state’s Special Commitment Center for sexually violent offenders to 10 years in prison for possessing child pornography.

Keith Jonathon Rogers in December pleaded guilty to possession of child pornography.

He was arrested in 2009 as part of a federal investigation of contraband smuggling at the facility.

Investigators said they found more than 350 images of child pornography on a computer in Roger’s room. The images mostly showed young girls being raped by men, according to a news release issued by the U.S. Attorney’s Office in Seattle.

State officials speculated Rogers might have obtained the images through the U.S. mail.

Rogers has been confined to the facility on McNeil Island since 1993 under a law that allows sex offenders who have completed their prison sentences to be civilly committed to the state’s custody.

He has prior convictions for contributing to the delinquency of a child, lewd and lascivious acts toward a minor and indecent liberties.

U.S. District Judge Ronald Leighton said before sentencing Rogers that child porn “permanently scars young children so that older people, like the defendant, can be pleasured by broken images.”