Cast-off Pattern – Bloodstain Pattern Analysis Terminology (IABPA)

Note: At the 2009 IABPA meeting in Portland, OR, USA, the IABPA membership voted to adopt the SWGSTAIN recommended terminology.

Definition

Cast-off Pattern: A bloodstain pattern created when blood is released or thrown from a blood-bearing object in motion.

Bloodstain Example - Cast-off Pattern

This example was generated by putting blood on a knife blade and swinging the blade in a downward motion in front of the target.

The volume of the drops and impact angles changed as the knife continued through its downward motion.

Bevel & Gardner	Spatter Family - Linear - Cast-off
James, Kish & Sutton	Spatter - Projection Mechanism - Cast-off
Wonder	Spatter Groups - Cast-offs - Swing
SWGSTAIN	Cast-off Pattern - A bloodstain pattern resulting from blood drops released from an object due to its motion.