John William Byrd Jr. (December 18, 1963 – February 19, 2002) was an American murderer who was executed by lethal injection for killing convenience store clerk Monte Tewksbury. Byrd, who protested his innocence until his execution, spent 18 years and 6 months on Ohio's death row. Byrd was the third person to be put to death since Ohio reintroduced the death penalty in 1981. His execution remains controversial.