BPA MOCD 2
- Created by: meganjayne15
- Created on: 03-05-14 15:02
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- BPA (MOCD) 2
- transfer
- evidence recording
- 1. Establish main areas of interest
- 2. sketch area of interest
- 3. assess pattern type
- 4. take photographs and notes
- 5. Ensure that all dark surfaces are examined - may be non-visible blood present - consider lighting and or chemical enhancement
- on garments
- identify type of stain
- identify the patterns of staining
- can the patterns be reproduced?
- Consider circumstances or available information about incident
- support or refute any statements
- considerations
- fabric absorbs blood at different rates
- movement of wearer
- blood deposited at other time than the incident
- washing garment
- active
- composite stains
- complex
- blood into blood
- complex
- arterial damage
- breach sites (table on revision pics)
- influenced by
- location of artery
- severity of injury
- surface orientation
- nature of target surface
- medical intervention
- cast-off
- types
- swing cast off
- minimum number of blows
- end of swing
- swinging action
- in line staining
- cessation cast off
- ?Momentum transfer
- percussive staining
- "feathering"
- swing cast off
- types
- impact spatter
- Blood projected and dispersed by forces,
other than gravity, acting on a source of blood
- misinterpretation of impact spatter
- expirated blood
- secondary spatter
- cast off
- variables
- shape of weapon
- weight and length of weapon
- number of impacts
- amount and direction of force applied
- location of sites of injury
- amount of blood
- misinterpretation of impact spatter
- Blood projected and dispersed by forces,
other than gravity, acting on a source of blood
- composite stains
- passive
- single drops
- free falling
- large drops travel further than small drops
- gravity vs friction
- volume determined by source
- resulting stain determined by:
- nature of target surface
- spines
- secondary spatter
- surface angle
- distance dropped
- drop volume
- nature of target surface
- free falling
- large volume
- scene information
- minimum time
- number of scenes
- speed of blood loss
- scene information
- PABS
- physiological change
- other body fluids present
- evidence of cleaning up
- physiological change
- single drops
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