ATLANTA (AP) — A Georgia death row inmate who killed a sheriff's deputy during a traffic stop is set to be executed.

Andrew Howard Brannan is scheduled to die at 7 p.m. Tuesday at the state prison in Jackson.

Brannan was convicted in the January 1998 slaying of 22-year-old Laurens County sheriff's deputy Kyle Dinkheller.

Authorities have said Dinkheller stopped Brannan for driving 98 mph and demanded he take his hands from his pockets. Brannan then began cursing, dancing in the street and saying "shoot me" before he rushed the deputy and shot him nine times when he called for backup.

Lawyers for the 66-year-old Vietnam veteran said the shooting was tied to mental illness that can be traced directly to his military service and argued he should be spared execution