forensic

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Author:
kevindevriendt
ID:
174536
Filename:
forensic
Updated:
2012-09-30 18:56:46
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forensic
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Description:
forensic
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  1. permanent incisors
    • 8 total, four max four man.
    • Labial
    • anterior teeth
    • no cusps
    • single root
    • cuttingflat chisel like
  2. Permanent canines
    • 4 total 2 max two man
    • single cusp long single root
    • tearing,cutting, holding
    • labial
  3. Permanent PREmolars
    • 8 total
    • two cusps 1-2 roots
    • purpose is grinding
  4. Permanent molars
    • 12 total
    • 3 + cusps
    • 2+ roots
    • purpose grinding
  5. teeth- adult vs child
    • Adult, 12 molars, 8 premolars, 4 canines, 8 incisors
    • Child, 8 molars, no premolars, 4 canines, 8 incisors
  6. What animals posess that humans dont
    • Penis bone - bacculum
    • metapodials
    • plexiform bone
  7. what human have that animals don't
    • separate clavicle
    • unfused tibia, fibula and ulna
    • metacarpals
  8. animal vs human bone
    • Animal has a smoother cortical surface
    • smoother surface
    • greater bone density relative to size
    • thicker bone cross section
    • bears have claws + distal ends of their phalanges are  more grooved
  9. Contemporary bones
    • Yellowish
    • greasy
    • heavy/solid - due to organic matter
    • smooth
    • tough
    • surgical implants 
    • coffins
  10. Non contemporary bones
    • discoloured
    • grainy
    • dry
    • light and fragmented
    • sun bleaching if left out
    • colour of surrounding soil if in ground
    • fragile
    • decorative dentalfilling
    • severe dental wear
    • disfigured skulls
  11. Non interest in bones if they are
    flexed, semi flexed, in coffin, extended coffin burial
  12. 4 tasks of recovery scene methods
    Location, mapping, extracting and collecting
  13. methods of recovery scnece methods established by 
    Morse et. al
  14. Mass disaster scene
    • Many personnel required
    • scene known so first stage unecessary
    • collected immiediately to avoid decray and identification possibilities
    • numbers assigned to bodies
    • central axis used instead of grid system
    • temporary morgue
    • victim identificaiton system
    • questionnaire for families
  15. Genocide
    definition 
    Crime committed with intent to destroy in whole or in part a national, ethnic,racial, religious grou
  16. the 3 components to genocide investigation
    • Preforensic investigation
    • - identification of site, eye witness and using aerial photos
    • Forensic investigation
    • -has four main group of people
    • - chief investigator
    • -chief archaeologist -site excavation
    • -chief anthropologist - charge of skeletal analysis
    • chief pathologist - establishc c. of death and identity of victims
  17. 6 stages of decomp
    fresh, early, active, advanced, skeletal/dry, extreme decomp
  18. four stages of fresh decay
    • Pallor - paleness (can only used <30min)
    • Algor - temp (18 hours)
    • Livor - blueness of death
    • -settling of blood (no blood at contact pallor)
    • Rigor - stiffness of death
    • - small muscles (2-4 hrs) big muscles (12 hrs), finish in 24 hours
  19. Early decomp
    • Autolysis and putrefaction
    • green abdomen (cecum) lower right side (24-36)
    • marbling (36-48)
    • bloating (36-72)
    • purging of fluids, frothy = lungs 3 days~week
  20. Active decay
    • Black putrefaction 10  - 25 days
    • smell of death hydrogen sulphide, putrescine, CH4, cadaverine
    • bloating gona, flat skin peeling back
    • digestive organs first to decomp - muscles and connective tissue last.
  21. advanced decay
    • 20-50 days
    • butyric fermentation - breaking down of fluids creating a cheesy smell.
    • body finished flatening and fluids drying
    • mummification occuring (warm dry conditions) can take 1 to 6 months to occur, skin leathery and organs like putty
    • adipocere (grave wax) hydrolysis of fat
    • occurs in anerobic conditions (water) where bacteria can no longer survive, causing the body to slow in decomp
    • 1 to several months
  22. skeletal/dry remains 
    • 50+ days
    • body reduced to skeletons
    • little soft tissue left
    • use soil samples ot find tissue break down
    • dermestid beetles, moths and bacteria feed on hair and keratin, mites eat bacteria
  23. extreme decomp
    • bleaching
    • exfoliaiton - loss of bone metaphysis and epiphysis
  24. body left outside 1 week =
    body in water 2 weeks and body in soil for 8 weeks
  25. times line of adult fly cycle
    egg 24 hours = 1st instar larva +27 hours =2nd instar larva =+22 hourss = 3rd instar larva +130 hours = papa + 143 hours = fly
  26. descriptive qualities of fly cycle
    • eggs - small rice grains
    • larvae- cooked rice grains
    • pupae - brown rice grains

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