What are the four important factors to consider when deciphering the events that occurred when blood is present at a crime scene? How does each factor affect the appearance of the blood stain(s). Give examples as needed.

1. Surface texture.

2. Direction of travel

3. Angle of impact

4. Origin.

Explanation:

Surface texture helps you to analyze blood spatter.

The point end of a bloodstain always faces the direction of travel.

The stain becomes elongated as the angle of impact decreases

To determine the origin of the blood, you can draw straight lines through the long axis of the blood stains

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