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Homicide Chapter 9 Ol
 

Homicide Chapter 9 Ol

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    Homicide Chapter 9 Ol Homicide Chapter 9 Ol Presentation Transcript

    • Warren McLeod, MA, D-ABMDI South Puget Sound Community College
    • Time of death
      • TIME OF DEATH:
      • - may focus attention on specific suspect
      • -corroborate/disprove alibi
      • -NO SINGLE RELIABLE METHOD EXISTS
      • -variables
      • Homicide investigators should be aware of postmortem changes
      • PROCESS OF DYING:
      • -heart stops/blood stops organs die at various time frames
      • -postmortem decomposition begins right at death (death of immune system)
      • -temperature, time, location, humidity, physical condition, clothing
    • POST MORTEM
      • Changes after death:
      • -Color: waxy, translucent look
      • Eyes:
      • -no reaction to light/touch
      • -cornea cloudy
      • -tache noire
      • Algor mortis: loss of body heat
      • -98.6 during life
      • -after life: loses heat until same as environment
      • -rate of cooling a variable in determining time of death
      • -rectum/liver temperature probe
      • -ambient temperature
      • -Livor mortis: Blood stops pumping and pools to lowest point
      • Blanching-2-12 hours
      • Fixed-12-24 hours
    • POST MORTEM
      • Livor mortis:
      • -tells position of the body
      • -colors can vary
      • Cherry red
      • Deep red/purple
      • Petechia
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    • POST MORTEM
      • Rigor mortis: stiffening/contracting of muscles
      • -2-4 hours after death
      • -neck/jaw/progresses
      • -Full 12-24 hours
      • -Passing-same progression as it started
      • -Completely passed 24-48 hours.
      • ALL TIMES ARE ESTIMATES DUE TO VARIABLES!
      • Cadaveric Spasm
      • GASTROINTESTINAL CONTENTS:
      • -digested/undigested foods
      • -various ingested foods at various times in body
      • -empty within 4-6 hours
      • -contents can be determined
      • Putrification:-decomposition
      • breakdown of cells/organs (autolysis)
      • -effected by environment
      • Bacterial
      • -soft tissues to liquids/gases (phew)
      • -starts right after death-noticeable after 24 hours
      • -greenish discoloration after 36 hours (abdomen)
      • -veins in skin purple blue (marbling)
      • Bloating-several days
      • -Skin blisters
      • Adipocere:
      • -greasy, soap like substance on body surface (moist area)
      • EXTERNAL AGENTS OF CHANGE:
      • - insects-
      • Entomologist
      • Stages of development
      • -Animals-
      • Domestic
      • Ferrel