Initial reviews of an execution in which an inmate repeatedly gasped and took 26 minutes to die found no reason to change the new way Ohio puts prisoners to death.
The reviews, required by prison rules, found that the state execution policy was followed and execution and medical team members did what they were supposed to.
The state still plans a longer review of Dennis McGuire's January 16 execution. It was the longest procedure since Ohio resumed putting inmates to death in 1999.
His family is suing, saying it was cruel and inhumane.
McGuire was executed for the 1989 rape and stabbing of a pregnant woman.
The results of the reviews were first reported by The Dayton Daily News.