controversial execution in arizona has taken a surprising turn. a federal appeals court judge involved in the case says when it comes to the death penalty, it's time to ditch lethal injections and bring backfiring squads. here's abc as pierre thomas. >> reporter: the state of arizona is investigating why it took so long to execute this inmate, murderer joseph rudolph wood was supposed to die roughly ten minutes after he was given a lethal injection. instead, it turned into 117-minute ordeal. >> to watch a man laying there, gulping air. >> reporter: it took so long, 50 minutes in, woods' attorney filed a stay with u.s. supreme court in a last-ditch effort to save his life. >> for it to take two hours for a man to die, i think, is certainly cruel and unusual. >> reporter: woods' case follows botched executions with similar drugs in ohio and oklahoma in