An Arizona man who kidnapped and murdered his girlfriend’s ex-husband near Mesa was executed Wednesday, the second of four prisoners scheduled to be put to death this week in the U.S.

Aaron Brian Gunches, 53, was lethally injected with pentobarbital at the Arizona State Prison Complex in Florence, John Barcello, deputy director of Arizona’s department of corrections, told news outlets. He was pronounced dead at 10:33 a.m.

Gunches fatally shot Ted Price in the desert outside of Mesa in 2002. He pleaded guilty to first-degree murder in 2007.

Sitting up on a gurney, covered with what looked like a white onesie and tucked in with a sheet, Gunches looked straight ahead and had no final words before the execution, witnesses said.

According to Barcello, the prisoner took a few heavy breaths and let out a snoring-type sound after the lethal injection.

“By all accounts, the process went according to plan without any incident at all,” Barcello said.