Gas Abuses In Indiana Prisons: The Cases Of Marshawn Weems Prison Abuse of Tear Gas Tear gas, inside the confined spaces of prisons, takes on a particular abusive effect and lethality. It chokes off the air and lingers for hours if no exhaust system is used to remove it. It clings to surfaces for days, if sprayed areas aren’t decontaminated. To top it off, the weapon is lethal in itself. As I’ve written before1, this weapon, along with its sister chemical weapons like mustard gas, chlorine gas, and others, was designed and used during World War l, and subsequently banned from battlefields...