Updated

A man convicted of killing his wife decades ago at a camping center he managed in Memphis is set for execution in Tennessee.

Sixty-eight-year-old inmate Don Johnson is scheduled to receive a lethal injection Thursday evening for the 1984 suffocation death of his wife, Connie.

Johnson would be the fourth person executed in Tennessee since August, barring a last-minute stay. The last two inmates executed in Tennessee chose the electric chair, saying they believed it offered a quicker and less painful death than the state's default method, a three-drug lethal injection.

Gov. Bill Lee declined clemency requests for Johnson from religious leaders including the president of the worldwide Seventh-day Adventist Church, of which Johnson is a member.

Alabama is also scheduled to carry out a lethal injection Thursday evening .