DENVER (AP) – A man on death row for the slayings of four people at a Chuck E. Cheese restaurant in Aurora has lost an attempt to challenge his conviction in a separate robbery.

Nathan Dunlap was convicted in 1993 in the shooting rampage at Chuck E. Cheese. His conviction in a separate robbery of a Burger King was used as an aggravator in his sentencing in the shootings.

Dunlap’s attorneys said the robbery trial should have been moved from Arapahoe County because jurors could’ve been biased by media coverage of the slayings, and that prosecutors’ statements to jurors about the credibility of their witnesses were improper.

The Colorado Court of Appeals rejected Dunlap’s arguments, and the 10th U.S. Circuit Court of Appeals ruled Tuesday that those rulings weren’t inconsistent with federal law.

(© Copyright 2011 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)