OMAHA, Neb. (AP) — A convicted sex offender in Omaha has been imprisoned for distributing child pornography.

51-year-old Lawrence Quignon was sentenced Monday in U.S. District Court in Omaha to 15 years. He must serve 10 years of supervised release after he leaves prison. He’d pleaded guilty.

Prosecutors say Quignon admitted uploading images of child pornography onto an online chat service.

Quignon was previously convicted of sexual assault of a minor in Adams County in 1999. He is required by state law to register as a sexual offender for life.