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How does blood spatter help solve a crime?
How can investigators determine the direction of blood spatter?
Investigators use the location, shape, and pattern of the blood spatter to determine the directionality of the blood. For example, if the blood spatter is elliptical in shape, the direction of the blood will be pointing towards the elongated point of the ellipse. Additionally, if there is a tail on the blood spatter, the direction of the tail will indicate the direction of the blood flow.