Bob Barr : The parole board 's denial of clemency to John Davis was wrong ruling . Barr : Was allowed to be executed despite significant doubt about his guilt . Only the Georgia Board of Pardons and Paroles stood between life and death for Troy Anthony Davis , and the core principles of American jurisprudence should have been the board 's guide . 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 : The parole board 's denial of clemency to John Davis was wrong ruling . Barr : Was allowed 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 .