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Chapter 10

Terms in this set (14)

A shooting may leave a distinct gunshot spatter pattern. This may be characterised by both forward spatter from an exit wound and back spatter from an entrance wound.

A cast-off pattern is created when a blood-covered object flings blood in an arc onto a nearby surface. This kind of pattern commonly occurs when a person pulls a bloody fist or weapon back between delivering blows to a victim. The bloodstain tails will point in the direction in which the object was moving.

Arterial spray is created when a victim suffers an injury to a main artery or the heart. The pressure of continuing pumping of blood causes blood to spurt out of the injured area.

Expirated blood pattern is a pattern created by blood that is expelled out of the nose, mouth, or respiratory system as a result of air pressure and/or airflow.

Avoid patterns- An area within a deposited spatter pattern that is clear of spatter, caused by an object or person blocking the area at the time of the spatter's deposition.

Contact/Transfer patterns- A bloodstain pattern created when a surface that carries wet blood comes in contact with a second surface; recognisable imprints of all or a portion of the original surface or the direction of movement may be observed.

Flow Pattern- A bloodstain pattern formed by the movement of small or large amounts of blood as a result of gravity's pull.

Pool Patterns- A pool of blood occurs when blood collects in a level (not sloped) and undisturbed place.

Skeletonization- The process by which the edges of a stain dry to the surface in a specific period of time ( dependent on environmental and surface conditions.) Skeletonization will remain apparent even after the rest of the bloodstain has been disturbed from its original position.

Drip Trail Patterns- A pattern of blood stuns formed by the dripping of blood off a moving surface or person in a recognisable pathway separate from other patterns.