ALABAMA executed convicted murderer Kenneth Smith, who held his breath in vain as officials asphyxiated him with nitrogen gas, the first use of a new method of capital punishment since lethal injections began in the U.S. four decades ago. Smith, convicted of a 1988 murder-for-hire, was a rare prisoner who had already survived one execution attempt. In November 2022, Alabama officials aborted his execution by lethal injection after struggling for hours to insert an intravenous line needle in his body. The state has called its new closely watched protocol "the most painless and humane method of execution known to man." It predicted…