Bloodstain pattern evidence is often present at crimes of violence. Because blood behaves in unpredictable mechanisms the investigator should make an educated guess to determine what took place at the crime scene. Then, determine to whom the blood belongs through DNA.

Question

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Blood behaves according to predictable physical principles, allowing trained investigators to analyze bloodstain patterns to help reconstruct events at a crime scene, rather than making educated guesses. Determining to whom the blood belongs through DNA is a separate process.

Bloodstain Pattern Evidence Is Often Present at Crimes of Violence