ARTERIAL SPURTING

• Effect when an artery or blood vessel
• in the human body is cut.

BACK SPATTER

• Back Spatter -- Blood directed back towards the source of energy or force that caused the spatter. Bloodstain-
• Evidence that liquid blood has come in surface

CAST OFF PATTERN

• A bloodstain pattern created when blood is released
• Or thrown

HIGH VELOCITY IMPACT STAIN

• Produced by a gunshot.
• Existing the body under pressure from
• a breached artery.

MEDIUM VELOCITY IMPACT STAIN

• Is considered when a source of blood
• is subjected to a force of from five to twenty five feet per second.
• The resulting stains range from one to four mm in diameter.

LOW VELOCITY IMPACT STAIN

• The result of a dripping blood.
• The force of impact is five feet per second or less
• and the size of the droplets is somewhere.

PASSIVE DROP

• Created or formed from the force
• of gravity

SWIPE PATTERN

• The transfer of blood from a moving source,
• Onto an unstained surface.
• Direction of travel may be determined by feathered
• Edge.

Transfer contact stains


Transfer or contact stains result when a bloodied surface comes into contact with another surface, transferring blood to that secondary target. The study of this type of bloodstain can prove particularly beneficial in establishing a sequence of events at the incident scene and tracing the movement of objects or individuals. In some cases it may even be possible to establish what object the transfer stain was likely to be caused by, for instance if a particular pattern is produced that can be traced to a blood-bearing object. Similarly, such bloodstains may be left by the hands of an individual, thus opening the possibility of fingerprint evidence.