Jack Moore, 52, was sentenced Tuesday in U.S. District Court in Portland, after pleading guilty in April to a single count of possession of child pornography.

PORTLAND, Maine (AP) _ A Berwick man federal prosecutors say amassed a large collection of child pornography on his computer has been sentenced to seven years in prison.

Jack Moore was sentenced Tuesday in U.S. District Court in Portland. The 52-year-old Moore pleaded guilty in April to a single count of possession of child pornography.

The judge called Moore's child pornography crimes an "addiction'' and labeled the content of the 10,000-plus pornographic images and dozens of videos as "sadistic.'' The judge said Moore continued to collect pictures of child pornography even after he knew he was subject to a federal investigation in 2008.

The Portland Press Herald reports that Moore's attorney sought a three-year sentence, saying his client never harmed a child himself and looks at what he did with "disgust.''