CHEYENNE, Wyo. (AP) - A Wyoming man convicted of trying to hire a hit man to kill his parents is asking a federal appeals court to set aside his 35-year prison sentence and order a mental health review.

Prosecutors said Andrew Silicani was serving time in state prison on robbery convictions last year when he tried to hire someone to kill his mother and stepfather in Cheyenne for insurance money.

A confidential source tipped off prison officials and Silicani wound up communicating with an FBI agent posing as a hit man. Silicani pleaded guilty to using the mail to try to commission the murders.

Lawyers for Silicani filed papers in federal appeals court in Denver this week claiming U.S. District Judge Nancy Freudenthal of Cheyenne should have sent him for a mental health assessment.