CHEYENNE, Wyo. (AP) — A federal appeals court has rejected an appeal from a Wyoming man convicted of murdering his wife.

A three-judge panel of the 10th U.S. Circuit Court of Appeals in Denver on Wednesday rejected an appeal from David Bush. He's serving a sentence of 45 years to life.

A state jury in 2007 found Bush guilty of second-degree murder in the death of Lynn Bush. She disappeared in Natrona County in 1990 and her body has never been found.

David Bush had argued that the Wyoming court system violated his rights by prohibiting him from arguing that his brother might have been responsible for the crime.

Wednesday's appeals court ruling upheld an earlier decision by U.S. District Judge Alan B. Johnson of Cheyenne rejecting Bush's arguments.