Bloodstain Pattern

Small drops of blood that are distributed around the perimeter of a drop or pool of blood (produced as a result of the blood impacting a surface)

• Satellite spatter

• Impact spatter

• Back spatter

• Expirated bloodstain

Produced when an object makes forceful contact with a source of blood, projecting drops of blood outward from the source

• Impact spatter

• Satellite spatter

• Flow bloodstain

• Void bloodstain

Impact spatter pattern created by a force traveling 5 feet per second or less and producing drops with diameters greater than 3 millimeters

• Low-velocity

• Medium-velocity

• High-velocity

Spatter projected outward and away from the source, such as an exit wound

• Satellite spatter

• Forward spatter

• Back spatter

• Blowback spatter

Blood projected backward from a source, such as an entrance wound

• Expirated bloodstain

• Forward spatter

• Back spatter

• Arterial bloodstain

Impact spatter pattern created by a force traveling 5 to 25 feet per second and producing drops with diameters between 1 and 4 millimeters

• Low-velocity

• Medium-velocity

• High-velocity

Impact spatter pattern created by a force traveling at 100 feet per second or faster and producing drops with diameters less than 1 millimeter

• Low-velocity

• Medium-velocity

• High-velocity

Pattern created when blood is flung from a blood-bearing object in motion onto a surface

• Impact

• Cast-off

• Pool

• Void

Spatter created when a victim suffers an injury to a main artery or the heart

• Void

• Cast-off

• Expirated

• Arterial

Patterns caused by blood that is expelled out of the nose, mouth, or respiratory system as a result of air pressure and/or airflow

• Contact/transfer

• Arterial

• Pool

• Expirated

Tags

NGSS.MS-PS2-5