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Published byJosephine Barton Modified over 8 years ago
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Chapter 11
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Brain death End of blood circulation Autolysis (Fig. 11-1 from book removed)
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“Manner of Death” Natural death Accidental death Suicidal death Homicidal death
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Cause of Death Describes events leading to death Examples: stroke, drowning, shooting, etc. Mechanism of Death Specific change in body that brought about death Examples: loss of blood, pulmonary arrest, etc. Often single statement “Massive trauma to body leading to pulmonary arrest”
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Lividity – Pooling of blood in the body Appears two hours after death Permanent after eight hours Process is faster in hotter temperatures Livor Mortis – “Death Color” (Fig. 11-4 from book removed) Has the body been moved?
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Rigor mortis – “Death stiffness” Starts within 2 hours Most rigid at 12 hours Gradually disappears after 36 hours (Fig. 11-5 from book removed)
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Rigor mortis is affected by: Temperature (cooler takes longer) A person’s weight (fatter takes longer) Type of clothing Illness Level of physical activity shortly before death (faster after exercise) Sun exposure
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Algor mortis – “Death heat” Temperature loss About 1 degree F or 0.78 degrees C per hour Slowed by weight, clothing, or hot environments Temperature determined by thermometer in liver
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Forensic entomology Insect stages: Egg Larva (instar) Pupa Adult
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Factors affecting insect development Temperature Wind Time of day Season Exposure to elements Estimation of time of death obtained by raising insects from scene in same conditions at lab. Process is known as Accumulated Degree Hours (ADH)
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