1 Chapter 11 Death use insect evidence to estimate time of death explain how environmental factors can affect the estimated time of death Properly i.d. cause, manner & mechanism of death explain the development of livor, rigor, and algor mortis following death use evidence of these to estimate time of death use evidence on stomach contents to estimate time of death ✓ ✓
Chapter 11 Death. use insect evidence to estimate time of death explain how environmental factors can affect the estimated time of death Properly i.d. cause, manner & mechanism of death explain the development of livor, rigor, and algor mortis following death - PowerPoint PPT Presentation
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1
Chapter 11 Death
use insect evidence to estimate time of death explain how environmental factors can affect the
estimated time of death Properly i.d. cause, manner & mechanism of deathexplain the development of livor, rigor, and algor
mortis following death use evidence of these to estimate time of death use evidence on stomach contents to estimate time
of death
✓✓
TODAY’S GOALS (2 of em’):
1. Identify the definition of death
2. Demonstrate knowledge of: –cause of death–manner of death–mechanism of death
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THE BIG IDEA
DEATH = the point where resuscitation (bringing back to life ) becomes impossible
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* * * It helps to think of death as a process not an
instant event * * *
Imagine you’re a forensic pathologist
Your job is to identify the following 3 things:
1.Cause of death
2.Manner of death
3.Mechanism of death
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* Depending on your
answers a formal
investigation may be
opened *
In the tune of “Frosty the Snowman” by Walter “Jack” Rollins and Steve Nelson
Cau-ses are e-ventsThe man-ners are short
and sweetMech-an-ism is a body
change Lead-ing you to die5
♪♫
♬♪
♪
Cause of death
C.O.D. = the event that led to someone’s death
- Shark attack- Cancer- Shot
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CHECKING FOR UNDERSTANDING
Gang member shot in a retaliation killing = _________ Failing shop owner with family and life insurance
policy drives off a cliff = ______________ Hospital receives a gun shot victim who survived a
mob hit. Days after he is stabilized the mob returns and suffocates him with a pillow = _____________
Man survives atomic blast. 10 years later he gets cancer and dies = __________
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SHOT
CAR ACCIDENT
SUFFOCATION
Cause of death
CANCER
In the tune of “Frosty the Snowman” by Walter “Jack” Rollins and Steve Nelson
Cau-ses are e-ventsThe man-ners are short
and sweetMech-an-ism is a body
change Lead-ing you to die8
♪♫
♬♪
♪
Manner of death
Manner of death = the short official way a person’s death is described
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5 Manners of Death
CHECKING FOR UNDERSTANDING
80 yr old dies peacefully in her sleep = _________ Gang member dies in a retaliation killing = _________ Failing shop owner with family and life insurance
policy drives off a cliff = __________ 30 years after leaving his family on Christmas eve a
man’s mummified body is found in the chimney wearing Santa suit = _____________
Can’t be determined = _______________
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ACCIDENTAL
NATURAL HOMICIDE
SUICIDE
UNDETERMINED
Manner of death
In the tune of “Frosty the Snowman” by Walter “Jack” Rollins and Steve Nelson
Cau-ses are e-ventsThe man-ners are short
and sweetMech-an-ism is a body
change Lead-ing you to die12
♪♫
♬♪
♪
Mechanism of Death
Mechanism of Death = the physiological change that led to death
- Massive blood loss- Multiple organ failure- Trauma to the brain
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CHECKING FOR UNDERSTANDING
80 yr old dies in her sleep = __________________ Gang member shot = _________________________ Shop owner with life insurance policy drives his car off
a cliff = ________________________________ 30 years after leaving his family on Christmas eve a
man’s mummified body is found in the chimney wearing Santa suit = __________________________
Can’t be determined = _______________
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Stoppage of breathing (asphixia)
multiple organ failure bleed to death (exsanguination)
Trauma to the brain (cerebral contusion)
UNDETERMINED
Mechanism of death
Cause, Manner, & Mechanism Assignment (5 minutes or less)
1. On a new sheet of paper (that will be collected) write your name, date, and period.
2. Neatly create a sentence or two explaining a man’s death. (Using professional language)
3. Switch papers with a neighbor and then print your name at the bottom of their paper.
4. Identify the cause, manner, mechanism of their death story
5. Write a few sentences defending why you answered the way you did (use the word “because”)15
Based on these specifics, give an estimate for each of these on how much time has passed since the meal was eaten: 1. Food is still present in the stomach. 2. The stomach is empty but food is found in
the small intestine. 3. The small intestine is empty but waste is
Because scientists know how long it takes for the various stages of development at given temperatures, forensics entomologists can determine when the insects arrived.
Because life cycles are affected by fluctuations in the daily environmental conditions, insect evidence cannot provide an exact time of death.
Insect evidence, nonetheless, can yield a close estimate.