Wasp Knife

The Wasp Knife is a trademarked knife containing a cylinder of compressed gas in the hilt. When a target is stabbed, about a cubic foot of gas is rapidly injected deep into the wound site, causing damage from displacement and the freezing effect of the free expansion of the gas. It is intended for use while hunting or against underwater predators.

It has gained a high profile thanks to recent use as a murder weapon in several popular procedural dramas.

Television

 * Murder weapon in season 7 of CSI:NY, episode 18.
 * Murder weapon in season 8 of NCIS, episode 10.
 * Murder weapon in season 12 of Law & Order: Special Victims Unit, episode 22.