CHEYENNE, Wyo. (AP) — A man convicted of committing sex crimes against a child at F.E. Warren Air Force Base in Cheyenne wants a federal judge to delay his sentencing hearing for a few months so he can qualify for a military pension.

Wyoming Army National Guard Lt. Timothy Wells was convicted in federal court in October of sexual exploitation of a child and other charges. He faces at least 15 years in prison.

Wells' lawyers at the Federal Public Defender's Office have asked U.S. District Judge Alan B. Johnson of Cheyenne to release Wells from custody temporarily and push his scheduled sentencing hearing back from next Tuesday until April so he can finish 20 years of military service necessary for a pension.

Federal prosecutors are urging Johnson to deny Wells' request.