Blood which is flung off of swinging objects creates which type of spatter?

• A. Impact Spatter
• B. Cast-Off
• C. Expirated Spatter
• D. Forward Spatter

Answer: (B)

Cast-off spatter happens when blood is on a weapon or other object that is swung or moved. As the object changes direction or continues its motion, the inertia of the blood causes droplets to be flung off, creating a line or arc of stains on surfaces in the path of the swing. The pattern often shows multiple cast-off droplets, roughly aligned in the order and direction of the blows, and the droplets can be elongated with tails toward the direction the weapon was moving. This is distinct from impact spatter (blood hitting a surface after a blow to a bleeding source), expirated spatter (blood expelled from the mouth or nose), or forward spatter (spatter traveling away from the source due to an impact).