Missouri Man Executed for 2002 Kidnapping, Murder of 6-Year-Old Girl

Johnny Johnson expressed remorse before his execution for abducting and killing 6-year-old Casey Williamson in 2002.
Johnson's attorneys argued he was mentally incompetent due to schizophrenia, but appeals claiming this were rejected.
Johnson took Williamson to an abandoned factory, attempted to sexually assault her, then beat her to death with a brick and rock.
Missouri Governor Mike Parson refused clemency, calling it one of the most horrific murders he'd seen.
Williamson's family and the original prosecutor witnessed Johnson's execution by lethal injection.