On February 8, 1924, exactly 100 years ago, a murderer died in a gas chamber for the first time. The method has since been abandoned, although it remains legally possible in some states.

Less than 20 years before its industrialization by the Nazi regime during the genocide, the gas chamber appeared promising to its defenders. The gas is invisible, “unlike the cinema scenes which have shaped the American imagination” - Simon Grivet, historian of the United States, specialist in law and justice.