Wound ballistics is the study of phenomena that arises when a
projectile strikes and penetrates a human or animal (1). Due to variability in biological wounds from projectiles, computational predictions are increasingly playing a role in drawing conclusions.
One important feature of wound ballistics is “backspatter,” a term used to describe any biological material ejected from a
gunshot entrance in the opposite direction to the line of fire (2,3). However, although it is well-documented, backspatter
mechanics is not fully understood and involves multiple factors including transfer of kinetic energy, rapid expansion of gas, and high deformation of biological material. A description of possible physical components of soft tissue wounding leading to backspatter has recently been discussed in (4).