At postmortem, an exhaust fan sucks the poison air out of the chamber, and the corpse is sprayed with ammonia to neutralize any remaining traces of cyanide. About a half an hour later, orderlies enter the chamber, wearing gas masks and rubber gloves. Their training manual advises them to ruffle the victim's hair to release any trapped cyanide gas before removing the deceased. In 1977, Oklahoma became the first state to adopt lethal injection as a means of execution, though it would be five more years until Charles Brooks would become the first person executed by lethal injection in Texas on December 2, 1982. When this method is used, the condemned person is usually bound to a gurney and a member of the execution team positions several heart monitors on this skin.
Long tubes connect the needle through a hole in a cement block wall to several intravenous drips.
The first is a harmless saline solution that is started immediately. Then, at the warden's signal, a curtain is raised exposing the inmate to the witnesses in an adjoining room. Then, the inmate is injected with sodium thiopental - an anesthetic, which puts the inmate to sleep. Next flows pavulon or pancuronium bromide, which paralyzes the entire muscle system and stops the inmate's breathing. Finally, the flow of potassium chloride stops the heart.