"Fackler [10, 13] however, disputed the shock wave hypothesis, claiming there is no physical evidence to support it, although some support for this hypothesis had already been provided by Harvey [20, 21], Kolsky [31], Suneson et. al. [42, 43], and Crucq [5]. Since that time, other authors suggest there is increasing evidence to support the hypothesis that shock waves from high velocity bullets can cause tissue related damage and damage to the nervous system. This has been shown in various experiments using simulant models [24, 48]. One of the most interesting is a study by Courtney and Courtney [4] who showed a link between traumatic brain injury and pressure waves originating in the thoracic cavity and extremities."