BBC's Horizon covered this back in 2008 with an episode titled "How to kill a human being"[1] where the show aimed to find the most humane form of death penalty

BBC's Horizon covered this back in 2008 with an episode titled "How to kill a human being"[1] where the show aimed to find the most humane form of death penalty. When supporters of the death penalty were asked if they would consider using hypoxia they dismissed it, saying words to the effect of "so what if the condemned are in a bit of pain?" [1] https://www.bbc.co.uk/programmes/b008rdyh https://www.bbc.co.uk/programmes/b008rdyh