Which term describes the bloodstain pattern created when a blood source adheres to a moving object and is then projected?

• A. Contact wound
• B. Cyanosis
• C. Cast-off
• D. Decompose

Answer: (C)

Cast-off patterns occur when blood adheres to a moving object and is then projected off as the object continues to move. As the weapon or object swings, blood clings to its edge and is flung away, leaving a line or arc of droplets on a nearby surface. The pattern often shows droplets in a directional sequence that mirrors the path of the moving object and can give clues about the number of swings and the motion involved. This distinguishes it from a contact wound (where the object is pressed against the body), cyanosis (a color change of the skin, not a pattern), or decomposition (decay-related changes, not a transfer pattern).