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Homicide Chapter 10 Ol

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Homicide Chapter 10 Ol

  1. 1. South Puget Sound Community College
  2. 2. <ul><li>Most facially recognizable to family/friends </li></ul><ul><li>Asian Tsunami </li></ul><ul><li>Mass Casualties (MCI) </li></ul><ul><li>Terrorist attacks </li></ul><ul><li>Joint contributions </li></ul><ul><li>IDENTITY: </li></ul><ul><li>-critical for case </li></ul><ul><li>-proves homicide occurred </li></ul><ul><li>-starting point for investigation </li></ul>
  3. 3. <ul><li>Most victims knew killer </li></ul><ul><li>“ stranger homicides” </li></ul><ul><li>Victimology profile </li></ul><ul><li>AT THE SCENE: </li></ul><ul><li>-friends/family </li></ul><ul><li>-follow protocols </li></ul><ul><li>-body photographed (complete description) </li></ul><ul><li>-fingerprinted </li></ul>
  4. 4. <ul><li>CLOTHING/POSSESSIONS: </li></ul><ul><li>-never use clothes alone </li></ul><ul><li>-ID/DL/SS Card/School ID </li></ul><ul><li>-clothing for sizes/brands/dry cleaning tags </li></ul><ul><li>PHOTOGRAPHS: </li></ul><ul><li>-Full facial/sides </li></ul><ul><li>-Tats/scars </li></ul><ul><li>X-RAYS: </li></ul><ul><li>-Medical records </li></ul>
  5. 5. <ul><li>DESCRIPTION OF BODY: </li></ul><ul><li>-Deformities/markings/abnormalities/distinctive traits </li></ul><ul><li>-Name/age/sex/race/length or height/build/shape of face </li></ul><ul><li>Neck/hair/facial hair/forehead/eyes/ears/nose/chin or jaw/mouth/teeth/lips/hands/fingers/feet/piercings/tattoos </li></ul><ul><li>Scars/prosthesis/dentures/malformations </li></ul><ul><li>JEWLERY/WATCHES: </li></ul><ul><li>-distinctive/inscriptions/jewelers marks/wear patterns/”rare piece” </li></ul><ul><li>-expensive jewelry can be traced </li></ul>
  6. 6. <ul><li>-distinctive jewelry can be released to media sources </li></ul><ul><li>FINGERPRINTS: </li></ul><ul><li>-3 principles </li></ul><ul><li>-vics prints on file-AFIS </li></ul><ul><li>OBTAINING PRINTS FRON DECEDENT: </li></ul><ul><li>-Post mortem print equipment (spoon) </li></ul><ul><li>Mummification: </li></ul><ul><li>-amputate/soften </li></ul><ul><li>Soaked (shriveled): </li></ul><ul><li>-Inject/rehydrate </li></ul>
  7. 7. <ul><li>De-gloving: </li></ul><ul><li>-skin peels off </li></ul><ul><li>-wear the glove </li></ul><ul><li>Advanced decomposition: </li></ul><ul><li>-Various techniques </li></ul><ul><li>MCI: </li></ul><ul><li>-Fingerprints/whole body x-rays/DNA (Flight 800) </li></ul><ul><li>DNA: WTC </li></ul><ul><li>-miniplexes developed </li></ul><ul><li>-STR obtained from badly degraded samples </li></ul><ul><li>-SNPs & extensive mitrochondial sequencing employed </li></ul>
  8. 8. <ul><li>TEETH: </li></ul><ul><li>-ante mortem records </li></ul><ul><li>-forensic odontology </li></ul><ul><li>-powerful cameras/x-rays/medical records </li></ul><ul><li>AGE: </li></ul><ul><li>-predictable process in teeth </li></ul><ul><li>-accurate under age 14 </li></ul><ul><li>-baby teeth-7 -24 months </li></ul><ul><li>-loss at 5-6 </li></ul>
  9. 9. <ul><li>-Past 14 years old-wear patterns </li></ul><ul><li>-estimate age within 5 years of accuracy (>14) </li></ul><ul><li>-within 6 months (<14) </li></ul><ul><li>FACIAL FEATURES: </li></ul><ul><li>-square/tapering/ovoid </li></ul><ul><li>-lower front teeth in position to upper front </li></ul><ul><li>Normal anatomical position (lower fit inside upper) </li></ul><ul><li>Overbite (protruding jaw) </li></ul><ul><li>Prognathic-lower teeth protrude </li></ul>
  10. 10. <ul><li>Race/socioeconomic group/occupation or habits </li></ul><ul><li>Positive ID: </li></ul><ul><li>-most effective when prints not available </li></ul><ul><li>-scientific means </li></ul><ul><li>-no two sets of teeth exactly alike </li></ul><ul><li>BONES: anthropology </li></ul><ul><li>-age </li></ul><ul><li>-sex </li></ul><ul><li>-race </li></ul><ul><li>-height </li></ul><ul><li>-R or L handedness </li></ul><ul><li>-Not positive ID but part of process </li></ul>
  11. 11. <ul><li>Age: </li></ul><ul><li>-Trained radiologist/anthropologist </li></ul><ul><li>-unpredictable to considerably accurate </li></ul><ul><li>-<30 reliability of formula decreases </li></ul><ul><li>-tooth structure more accurate than gross bones </li></ul><ul><li>-epiphyses: stage of uniting of bones varying w/age </li></ul><ul><li>-ossification centers: produce calcium </li></ul><ul><li>-womb </li></ul><ul><li>-finish at early 20’s </li></ul><ul><li>-formulas up to 25 yrs old considerable accuracy </li></ul>
  12. 12. <ul><li>Skull: </li></ul><ul><li>-Sutures-curved bones joined together </li></ul><ul><li>-early 20’s fill w/bone & close </li></ul><ul><li>-continues w/age and follows specific pattern </li></ul><ul><li>-remains of 30-80 yrs old given in 7-10 yr brackets </li></ul><ul><li>Pelvic Bone: </li></ul><ul><li>-changes at 5 yr intervals </li></ul><ul><li>Sex: </li></ul><ul><li>-whole skelton-90% accuracy </li></ul><ul><li>-pelvic most accurate </li></ul><ul><li>-females-distinctive: had child/children </li></ul>
  13. 13. <ul><li>Race: </li></ul><ul><li>Skull </li></ul><ul><li>-Caucasoid/Negroid/Mongoloid </li></ul><ul><li>-mixed races </li></ul><ul><li>Height: </li></ul><ul><li>-measure long bones comparing w/simple table </li></ul><ul><li>-within 1” of accuracy </li></ul><ul><li>-overweight/emaciated by muscle attachments </li></ul><ul><li>-R/L handed-bones of dominant arm slightly longer </li></ul><ul><li>-past trauma </li></ul>
  14. 14. <ul><li>Cause of death: </li></ul><ul><li>-skull most likely tool </li></ul><ul><li>Facial reconstruction: </li></ul><ul><li>-experts in field: too large an error of margin </li></ul><ul><li>FORENSIC ART: </li></ul><ul><li>-collaborative effort </li></ul><ul><li>-multidisciplinary: </li></ul><ul><li>*anatomy/biology/anthro/psych/pathology/odont </li></ul>
  15. 15. <ul><li>Four categories of forensic art: </li></ul><ul><li>-Composite imagery: combination of individually described parts </li></ul><ul><li>-Image modification/identification: manipulation/enhancement/comparison/categorization of photos. (age progressions) </li></ul><ul><li>-Demonstrative evidence: Visual presentations for court/2 or 3 dimensional or electronically created </li></ul><ul><li>-Reconstructive/Post mortem ID aids </li></ul>
  16. 16. <ul><li>Forensic art & ID of remains: </li></ul><ul><li>-art is done to attach a name to the deceased that will lead to + ID </li></ul><ul><li>2 dimensional Facial reconstruction: </li></ul><ul><li>-receive the skull </li></ul><ul><li>-gather case info </li></ul><ul><li>-prepare/protect skull </li></ul><ul><li>-glue mandible to jaw </li></ul><ul><li>-cutting/applying tissue depth markers (race/sex) </li></ul><ul><li>-photographed ( 1:1 scale) </li></ul>
  17. 17. <ul><li>-semi transparent paper taped over top of photos-artist draws face using tissue markers as guide </li></ul><ul><li>-anatomical formulas: eyes, nose, mouth </li></ul><ul><li>3 Dimensional Reconstruction: </li></ul><ul><li>-items from scene can be placed w/skull </li></ul><ul><li>-eyeglasses, dentures, jewelry, etc. </li></ul><ul><li>ID of decedent is critical to overall success of investigation! </li></ul><ul><li>-no ID-no suspect </li></ul>

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