Alabama has set another execution date, planning to put two men to death using nitrogen gas about a month apart.

On Thursday afternoon, Alabama Gov. Kay Ivey announced that Geoffrey Todd West will be executed sometime between 12:00 a.m. on September 25, and before 6 a.m,. September 26. He’s set to die by inhaling pure nitrogen gas– a method first used in Alabama last year.

West, 49, has been on Alabama Death Row for over 28 years for the March 1997 killing of Margaret Parrish Berry.

Court records show that on the evening of March 27, 1997, West and his then-girlfriend drove to a gas station where he had previously worked on Noccalula Parkway in Etowah County. According to court records, West had told people that he planned to rob the gas station.

Berry was working at the Chevron as an attendant. Records state that West went in the store, stole about $250 from a can where the store’s money was kept, and shot Berry in the head while she was lying on the floor.

At his original trial, a jury voted 10-2 for the death penalty.

West’s execution date is set for about a month after David Lee Roberts, who is set to die by also breathing in pure nitrogen gas on August 21.

Roberts is set to be the fourth man executed in Alabama this year. If he dies, West will be the fifth.

In February, Alabama executed Demetrius Terrence Frazier. The state was set to next execute Robin “Rocky” Myers, but in a rare move, Alabama Gov. Ivey commuted his sentence to life in prison.

James Osgood was executed in April, and on June 10, Gregory Hunt was put to death.

The Yellowhammer state led the nation in executions last year by executing six people: Kenneth Smith, Jamie Mills, Keith Gavin, Alan Miller, Derrick Dearman, and Carey Grayson.