Lester Bower is the oldest prisoner put to death in Texas since the state resumed capital punishment in 1982.
He received a lethal injection Wednesday evening for fatally shooting the four in October 1983 at an airplane hangar on the ranch about 60 miles north of Dallas.
Bower had insisted he was innocent and said the men were alive and well when he left after buying the ultralight airplane. But he couldn't prove he made the purchase and then lied to authorities when he was questioned.
He's the eighth Texas inmate put to death this year.