Bloodstain pattern lesson

Bloodstain pattern lesson

Multiple Choice

The acute angle formed between the path of a blood drop and the surface which it contacts.

• Area of origin

• Angle of impact

• Area of convergence

Multiple Choice

The area on a two-dimensional plane where lines traced through the long axis of several individual bloodstains meet. This approximates the two-dimensional place where the bloodstains were projected from.

• Area of origin

• Angle of impact

• Area of convergence

Multiple Choice

The location in three-dimensional space that blood that produced a bloodstain originated from. The location of the area of convergence and the angle of impact for each bloodstain is used to approximate this area.

• Area of convergence

• Area of origin

• Angle of impact

Multiple Choice

Blood directed back towards the source of the force that caused the spatter.

• Cast-off

• Back spatter

Multiple Choice

A characteristic bloodstain pattern containing spurts which results from blood exiting under pressure from an arterial injury.

• Expirated blood pattern

• Arterial spray

Multiple Choice

Blood which travels away from the source in the same direction as the force which caused the spatter.

• Forward spatter

• Back spatter

Fill in the Blanks

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 pattern's deposition.

Multiple Select

Transfer patterns

• swipe

• wipe

• trail

• droplets

• passive

Multiple Select

Projected Blood

• droplets

• wipes

• Expirated blood

• arterial spurts

• caused by shotgun wounds

Multiple Select

Passive drops can be caused by

• gravity

• shotguns

• blood dripping off a knife

• a nose bleed

• cutting an artery