“That’ll be five dollars,” Billie Wayne Coble, 70, reportedly said — although what he meant by the remark was unclear.
“Take care,” Coble also said to the five witnesses he selected to be in attendance, according to reports.
Coble received a lethal injection at the state penitentiary in Huntsville for the August 1989 shooting deaths of Robert and Zelda Vicha, the parents of his estranged wife, and their son, Bobby Vicha, a police officer, at separate homes in Axtell, northeast of Waco.
He gasped several times before he began to snore.
Coble, once described by a prosecutor as having “a heart full of scorpions,” was the oldest inmate executed by Texas since the state resumed carrying out capital punishment in 1982.
The Associated Press contributed to this report.