How did his victim die?
“How did his victim die?”
Well for starters it took her longer than 22 minutes to die after she was beaten and stabbed 17 times. This after she fought for her life.
She actually died in hospital while in surgery.
Nitrogen asphyxia. Instead of a poisonous gas, the gas mask delivered pure nitrogen. One feels panic due to accumulating carbon dioxide. Since the mask delivers pure nitrogen gas to replace exhaled air, there is no buildup of carbon dioxide. Therefore the brain does not perceive being asphyiated.
Horribly, so it only makes sense that he died the same way.
Bludgeoned and stabbed to death.