Anthony Boyd, who maintained his innocence until Alabama executed him last year at age 54, had an inexperienced court-appointed lawyer and was convicted on disputed eyewitness testimony. Charles Flores, 56, has spent 27 years on death row in Texas for a murder conviction based solely on unreliable testimony from a hypnotized witness. Robert Roberson, who has autism, remains on death row there despite having been convicted on now-debunked evidence that he had shaken his daughter to death.