BPA

?
  • Created by: molly_axx
  • Created on: 13-12-18 11:31
What is BPA?
The analysis of a physical image created on a surface when it becomes stained with blood.
1 of 14
What can BPA add to a case?
Timelines, nature of injury, type of weapon, staging, struggles.
2 of 14
What factors can affect BPA?
Environmental conditions, humidity, nature of assault, clean up attempts.
3 of 14
Explain Passive Single Drips
Surface tension is overcome by gravity, drop becomes spherical when airborne and lands directly below place of origin.
4 of 14
Explain Secondary Single Drips
A drop of blood impacts into a surface already wet with blood, blood breaks up under force of impact and produces satellite stains around the parent stain.
5 of 14
Explain Contact Staining
Formed when a surface comes into contact with wet blood, Locard's Principle of Exchange.
6 of 14
Explain Impact Spatter
Force is delivered into a surface wet with blood, force causes blood to break up and is dispersed away from point of impact. Visualised as small spots at scenes and on clothes.
7 of 14
Explain Cast Off
When a wet blood stained object is swung, force of the swing allows the blood to overcome force of surface tension and blood is flung in linear pattern.
8 of 14
Explain Large Volume Blood Stains
Pools of blood or blood soaked into materials.
9 of 14
Explain PABS
Clotting, expiated and clean up attempts.
10 of 14
Explain Complex Blood Stain Patterns
Stains involving more than one pattern in any one area.
11 of 14
Explain the main points of angle of impact
Smaller angle = longer blood stain becomes and pools. SIN0 = width/length
12 of 14
Explain Arterial Damage Staining
When an artery is damaged, it’s possible to obtain characteristic wave patterns as heart continues to pump blood through breached artery.
13 of 14
Explain 3 types of ADS
Arterial wave: moving. Arterial gush: standing still. Void: absence of a pattern or part of pattern.
14 of 14

Other cards in this set

Card 2

Front

What can BPA add to a case?

Back

Timelines, nature of injury, type of weapon, staging, struggles.

Card 3

Front

What factors can affect BPA?

Back

Preview of the front of card 3

Card 4

Front

Explain Passive Single Drips

Back

Preview of the front of card 4

Card 5

Front

Explain Secondary Single Drips

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Other resources:

See all Other resources »See all Blood Pattern Analysis resources »