According to documents obtained by The Guardian, the state of Arizona has plans to use hydrogen cyanide, the deadly gas used by Nazis at Auschwitz and other concentration camps, to kill inmates on death row.
Arizona Department of Corrections
The Arizona Department of Corrections reportedly spent more than $2 000 in procuring the ingredients for the gas. The ingredients purchased include a solid brick of potassium cyanide, sodium hydroxide pellets and sulfuric acid.
Cyanide is lethal in that it prevents the body from using oxygen. It was used in both World Wars – by French and Austrian troops in World War 1 and by Nazi Germany in World War 2.