STARKE, Florida (AP) — Florida has executed a man who fatally stabbed his wife and her young son in 1985. It is the third execution in the U.S. in less than 24 hours.

The issue has been in the spotlight since a botched April lethal injection in Oklahoma.

The Florida governor's office says John Ruthell Henry was pronounced dead at 7:43 p.m. Wednesday.

The 63-year-old was convicted and sentenced to death for fatally stabbing his wife, Suzanne Henry. He also was convicted of fatally stabbing her 5-year-old son hours later.

The U.S. Supreme Court turned down a last-second appeal by attorneys who argued Henry wasn't mentally stable enough to comprehend his death sentence.