BLOOD SPATTER PATTERNS

ARTERIAL SPURTING

• This type of blood spatter occurs when blood exits the body under some force of pressure due to a breached artery
• This is also known as the Gushing pattern

BACK SPATTER

• In this blood pattern the blood is directed back towards the source of force that caused the spatter

CAST-OFF PATTERN

• This blood stain pattern occurs when blood is thrown or released from a blood-bearing object while in motion
• For example if a knife with blood on it was thrown there would be a cast-off on a surface around it

HIGH-VELOCITY IMPACT STAIN (HVIS)

• This blood pattern is caused by a high velocity impact to a blood source
• These types of blood patterns can be caused by a gunshot or any type of high speed machinery

MEDIUM-VELOCITY IMPACT STAIN (MVIS)

• This blood pattern is caused by a medium velocity impact on a blood source
• A beating usually causes this type of blood spatter

LOW-VELOCITY IMPACT STAIN (LVIS)

• This blood pattern is caused my a low velocity impact on a blood source

PASSIVE DROP

• These bloodstain pattern drops are caused or created by the force of gravity acting along
• This is also the bleeding pattern

SWIPE PATTERN

• This pattern is caused by a transfer of blood from a moving source onto an unstained surface
• The direction left on the pattern depends on the the object and the way it moves

TRANSFER/CONTACT STAIN

• This bloodstain pattern is caused when a bloody surface comes in contact with another surface

MISTING

• This is when blood has been reduced to a fine spray as result to how much energy and force is applied