MADISON, Neb. (AP) — A 51-year-old Norfolk man has been sentenced to prison for possession of child pornography.

William Walter was sentenced Friday in Madison County District Court to six to 12 years in prison.

A tip from the National Center for Missing and Exploited Children led to a search of Walter’s home on April 1. Prosecutors say child pornography was found on a laptop, tower computer and several DVDs and CDs seized from Walter’s home.

Walter must serve nearly three years before he’s eligible for parole. He must also register as a sex offender upon his release from prison.