A Kalihi man was sentenced Thursday by a federal judge to 20 years in prison for child pornography.

Michael K. Kormanik, 54, was charged with and pleaded guilty to two counts of transportation of child pornography and one count of possessing child pornography. He was sentenced by Senior U.S. District Judge Helen Gillmor.

After serving his 20 years, he will be under supervised release for life and required to register as a sex offender, according to the U.S. Attorney’s Office.

In court proceedings it was disclosed that Kormanik’s home computer had more than 3,000 images and more than 400 videos of child pornography, and an IP address associated with Kormanik on a peer-to-peer file sharing network also had images of child pornography, according to a news release.

Kormanik faced a mandatory minimum sentence of 15 years because he had a prior conviction for sexual assault of a minor, related to his repeated sexual abuse of a 10-year-old boy, a news release said. Kormanik also admitted to having previously sexually abused two other young boys.

According to the release, at sentencing Gillmor “expressed serious concern that Kormanik had recently been spending significant time with young boys who lived in his neighborhood, and that he had provided them with marijuana.”