Gov. Haley Barbour has denied clemency to condemned inmate Dale Leo Bishop, leaving his life in the hands of the U.S. Supreme Court.

Barbour's policy adviser Daryl Neely told reporters of Barbour's decision during a briefing at Parchman Penitentiary as officials continued preparations for Bishop's 6 p.m. execution.

The Supreme Court has not yet taken up three pending appeals filed by Bishop's attorneys.

Bishop's attorneys say his life should be spared because he did not swing the hammer that killed Marcus James Gentry in 1998.

Bishop also claims his bipolar disorder prevented him from making a sound decision when he asked for the death penalty in 2000.