gassing

Later, she takes revenge on her entire clan — whom she considers complicit in keeping her committed at Arkham — by gassing them, strutting around her family’s mansion in a yellow gown and a gas mask.

In addition, the method used to kill the infected chickens — carbon dioxide gassing — required that workers move “from chicken to chicken” increasing their “degree of interaction with each potentially infected bird.”

Last week, the UN's High Commissioner for Human Rights urged a halt to the execution, saying that gassing Smith could amount to torture or other cruel, inhuman or degrading treatment under international human rights law.

Smith would be the first person in the US to face nitrogen gassing.

He is one of the only men in modern America to be taken twice for execution, and the first to face nitrogen gassing.