Alabama plans the first nitrogen gas execution this week in largely secret process experts say raises concerns about crueltyDakin Andone, CNNJanuary 23, 2024 at 11:04 AMAlabama intends to carry out the first known execution by nitrogen gas this week, when it’s scheduled to put to death Kenneth Smith some 14 months after failing to carry out his capital punishment by lethal injection.But little is known about how the method, nitrogen hypoxia, will be carried out during a 30-hour execution window Thursday into Friday, as the state’s published protocol bears redactions that experts say shield key details from public scrutiny. The state, in court records, indicated the…