Homicide Chapter 9 Ol

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Homicide Chapter 9 Ol

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

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