The opinions expressed in this commentary are solely those of Bob Barr . Bob Barr : Georgia parole board 's denial of clemency to Troy Davis was wrong ruling . Comment: Davis set to be executed despite significant doubt about his guilt . Davis , rather than innocent till proven guilty , had to prove innocence , Barr says . Barr says he supports death penalty but not when it 's on skimpy , unreliable evidence .
Bob Barr : Georgia parole board 's denial of clemency to Troy Davis was wrong ruling . Comment: Davis set to be executed despite significant doubt about his guilt . Davis , rather than innocent till proven guilty , had to prove innocence , Barr says . Barr says he supports death penalty but not when it 's on skimpy , unreliable evidence .