Crime scene investigators are tasked with determining the events of a crime. This normally consists of answering forensically relevant questions like who, what, where, how, and, when, regarding the observed and collected evidence at the crime scene. Biological material such as tissue and bodily fluids left at a crime scene can assist in answering these questions. A commonly encountered type of biological evidence at a crime scene is blood 1 (Box 1). As blood dries, it forms bloodstains with a variety of morphologies largely depending on formation mechanics and target surface properties . Source identification of a bloodstain is conducted through DNA profiling while bloodstain pattern analysis (BPA) provides potential interpretations of the physical events that created the bloodshed .