Alan Eugene Miller, 59, was pronounced dead at 6:38 p.m. local time at a south Alabama prison. Miller was convicted of killing three men — Lee Holdbrooks, Christopher Scott Yancy and Terry Jarvis — in 1999 and the state had previously attempted to execute him by lethal injection in 2022.

Alan Eugene Miller, 59, is scheduled to be executed with nitrogen gas at a south Alabama prison two years after the state unsuccessfully attempted to execute him by lethal injection. Miller was convicted of killing three men — Lee Holdbrooks, Christopher Scott Yancy and Terry Jarvis — in back-to-back workplace shootings in 1999.

Alan Eugene Miller, who was put to death on Thursday, was convicted of killing three people during a 1999 workplace shooting spree.