(AP) — A 51-year-old southeast Nebraska man has been sentenced to federal prison for receiving and possessing child pornography.

The office of U.S. Attorney Deborah Gilg says Christopher Bohlen, of Douglas, was given five years for receiving child pornography and a year and a day for possessing child pornography. The sentences are to be served at the same time.

Bohlen must serve five years of supervised release after he leaves prison.

Bohlen was identified as a child pornography suspect after the U.S. Postal Inspection Service noted correspondence to Bohlen from a website offering images of children.

Investigators say they found about 47,000 image files of child pornography on Bohlen’s computers. The images included some of children ranging from 2 to 12 years of age involved in sexual and sadomasochistic conduct.