Dennis McGuire is scheduled to die by lethal injection for the 1989 rape and slaying of Joy Stewart, a pregnant woman who lived in Preble County.
McGuire didn't sleep Wednesday night, spending most of the evening, night and morning before his execution talking to friends and family on the phone or in person.
"Some of those visits were emotional," said JoEllen Smith, spokeswoman for the Ohio Department of Rehabilitation and Corrections.
Prison officials say McGuire was "calm and cooperative" during his stay at the Southern Ohio Correctional Facility that started at 9:48 a.m. Wednesday.
His veins were assessed at 11:18 a.m. Wednesday and found to be "accessible and palpable."
He had two hot dogs for lunch Wednesday and visited with his son, daughter and ex-wife until visitations ended at 7:30 p.m.
He finished most of his sizeable last dinner Wednesday: roast beef, fried chicken, a bagel with cream cheese, fried potatoes with onions, potato salad, butter pecan ice cream and a Coke.
He talked on the phone through the night, mostly to his mother, stopping at 1 a.m. to write a letter. He turned down breakfast and a shower Thursday morning.
Last time Smith checked on him before a 8 a.m. media briefing, he was talking to his daughter, holding her hand.
"That visit was quiet and again it was emotional," she said.