Execution was `` a failed , agonizing experiment , '' attorney says . A medical expert questions why the process took 24 minutes . Convicted killer Dennis McGuire reportedly says ` ` I 'm going to heaven '' and is executed in Florida on April 29.
Execution was `` a failed , agonizing experiment , '' attorney says . A medical expert questions why the process took 24 minutes . Convicted killer Dennis McGuire reportedly says `` I 'm going to heaven '' Facing shortages , states are scrambling to find new drug protocols .