Nitrogen Hypoxia Execution: History, Protocol & Executions

Nitrogen hypoxia (inert gas asphyxiation) is an execution method that induces death by forcing the condemned prisoner to inhale pure, unoxygenated nitrogen gas through a sealed full-face mask. By completely displacing breathable oxygen from the respiratory tract, the procedure induces rapid arterial deoxygenation and fatal cerebral anoxia. Originally proposed as a humane, painless alternative when … Read more

The Gas Chamber

Between 1924 and 1999, 589 men and seven women were put to death in the gas chambers of various American states. At its peak, eleven states had adopted this method: Arizona, California, Colorado, Maryland, Missouri, Mississippi, New Mexico, North Carolina, Nevada, Oregon, and Wyoming. Eleven men have been gassed in five states since the resumption … Read more