Bloodstain Pattern Analysis, or BPA, is a forensic technique used to identify the potential source and trajectory of a bloodstain. In a new study, researchers have used fluid dynamics to create a new model for BPA. The new model takes into account the effects of the environment and different surface materials on the dynamics of a blood droplet. With this new model, scientists hope to more accurately determine the source and trajectory of a bloodstain and thus provide more reliable evidence for criminal investigations.

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source: Phys.org