NEW : Texas board members in heated exchange over whether man wrongfully executed . Rick Perry 's office and submitted to appeals courts before Willingham 's execution , while the other two came after his death . The Associated Press contributed to this report. Legal advocate questions the objectivity of the Texas board 's chairman . Panel 's chairman calls criticism `` personal attacks '' and says , `` We 're being used ''
NEW : Texas board members in heated exchange over whether man wrongfully executed . The Associated Press contributed to this report. Legal advocate questions the objectivity of the Texas board 's chairman . Panel 's chairman calls criticism `` personal attacks '' and says , `` We 're being used ''