The document discusses signs of death and changes that occur after death that can help estimate time since death. It describes immediate signs like cessation of breathing and brain activity. Early changes include facial pallor, eye changes, algor mortis (cooling of the body), and livor mortis (pooling of blood). Rigor mortis causes stiffening of muscles 3-8 hours after death. Later changes include decomposition, adipocere formation (preservation of fatty tissues), and mummification. Forensic entomology examines insect activity on corpses to estimate time of death if the body has been dead for weeks.
Thanatology
Types of transplants
Cause, Mechanism of Death
Manner of death
Anoxia
Signs of Death
Immediate Changes (Somatic Death)
Early Changes (Molecular Death)
Algor Mortis ......
Reference
Thanatology
Types of transplants
Cause, Mechanism of Death
Manner of death
Anoxia
Signs of Death
Immediate Changes (Somatic Death)
Early Changes (Molecular Death)
Algor Mortis ......
Reference
infanticide are quite common in India because of illiteracy as well as the female child unwanted . Now a days female sexual assault and murder is getting common in north Indian society
Forensic science PowerPoint presentation on Injury and it's medico-legal importance.
The slide is made for medical students. Mainly for BAMS students. It covers maximum points.
The slide is full of example with pictures which make it easy to understand the concept. It contains post-mortem findings as well as medico-legal importance of the each type of injury.
Derived from GK word daktylose-finger ,graphein- to write
Method of identification based on unique epidermal ridge pattern on the tips of fingers.
Syn-Fingerprinting, Dermatoglyphics, Galton system of identification
infanticide are quite common in India because of illiteracy as well as the female child unwanted . Now a days female sexual assault and murder is getting common in north Indian society
Forensic science PowerPoint presentation on Injury and it's medico-legal importance.
The slide is made for medical students. Mainly for BAMS students. It covers maximum points.
The slide is full of example with pictures which make it easy to understand the concept. It contains post-mortem findings as well as medico-legal importance of the each type of injury.
Derived from GK word daktylose-finger ,graphein- to write
Method of identification based on unique epidermal ridge pattern on the tips of fingers.
Syn-Fingerprinting, Dermatoglyphics, Galton system of identification
It is a newest research room where body and its decomposition is discussed. Interestingly, Human Decomposition study also called Body Farm uses biological anthropology and forensic biology to access, review and record human death, body and decomposition.
When a murder takes place and the forensic team comes to investigate it, they get a lot of information from the dead person as if, the corpse speaks to them.
A key factor useful in homicide investigations is timing. Knowing the exact time of the death makes it easier to catch the murderer. This article gives a rough idea of how to determine the exact time of death by examining the dead body. To understand this information, we will first look at when and what changes occur in the dead body after death.
This comprehensive program covers essential aspects of performance marketing, growth strategies, and tactics, such as search engine optimization (SEO), pay-per-click (PPC) advertising, content marketing, social media marketing, and more
The Impact of Artificial Intelligence on Modern Society.pdfssuser3e63fc
Just a game Assignment 3
1. What has made Louis Vuitton's business model successful in the Japanese luxury market?
2. What are the opportunities and challenges for Louis Vuitton in Japan?
3. What are the specifics of the Japanese fashion luxury market?
4. How did Louis Vuitton enter into the Japanese market originally? What were the other entry strategies it adopted later to strengthen its presence?
5. Will Louis Vuitton have any new challenges arise due to the global financial crisis? How does it overcome the new challenges?Assignment 3
1. What has made Louis Vuitton's business model successful in the Japanese luxury market?
2. What are the opportunities and challenges for Louis Vuitton in Japan?
3. What are the specifics of the Japanese fashion luxury market?
4. How did Louis Vuitton enter into the Japanese market originally? What were the other entry strategies it adopted later to strengthen its presence?
5. Will Louis Vuitton have any new challenges arise due to the global financial crisis? How does it overcome the new challenges?Assignment 3
1. What has made Louis Vuitton's business model successful in the Japanese luxury market?
2. What are the opportunities and challenges for Louis Vuitton in Japan?
3. What are the specifics of the Japanese fashion luxury market?
4. How did Louis Vuitton enter into the Japanese market originally? What were the other entry strategies it adopted later to strengthen its presence?
5. Will Louis Vuitton have any new challenges arise due to the global financial crisis? How does it overcome the new challenges?
2. Contents
What is death?
Time of death
Post Mortem Interval
Importance of time since death
Sources of evidence
Signs of death/ Changes after death
Immediate
Early
Late
References.
3. What is death?
Death is permanent and irreversible cessation of all vital
systems of body - The Tripod of Life.
Death can be classified as Somatic and Molecular.
4. Time of death
A recurring problem in forensic medicine is the need to
fix the time of death within the limits of probability.
The longer the interval of time between death and the
examination of the body, the wider will be the limits of
probability.
5. Post Mortem Interval
One must realize the possibility that the post mortem
interval(the time elapsed from death until discovery
and medical examination of the body) may be preceded
by a significant survival period(the time from injury or
onset of the terminal illness to death).
The survival interval is best established by evaluating
the types, severity and number of injuries present and
the deceased's response to them, taking into account
pre-existing natural disease.
6. Importance of time since death
Establishing the times of an assault and death has a
direct bearing on the legal questions of alibi and
opportunity.
If the suspect is able to prove that he was at some other
place when the fatal injury occured then he has an alibi
and his innocence is implicit.
Conversely, if the time of a lethal assault coincides with
the time when the suspect was known to be in the
vicinity of the victim, then the suspect clearly had an
opportunity to commit the crime.
7. In cases of infanticide, it is necessary for the prosecution
to establish that the child was born alive and was killed
afterwards.
In the absence of proof that death occurred after a
live birth, there can be no prosecution for
infanticide
Similarly, in bodies recovered from fires, it is critical to
establish whether death occurred before or during the
fire and this is important in establishing the manner of
death.
8. Signs of death/changes after death
The signs of death or changes after death or the methods of
estimating time since death may traditionally be studied under the
following heads:
IMMEDIATE
Insensibility and absence of EEG rythm
Cessation of respiration
Cessation of circulation
EARLY
Facial pallor & changes in the skin
Changes in the eye
Algor mortis
Livor mortis (Postmortem Hypostasis)
Rigor mortis
10. Immediate signs of death
Cessation of respiration & circulation: Ordinarily these
signs are considered sufficient to determine that death
has taken place, but these alone shouldn’t be relied on
as absolute signs to avoid premature burial or
cremation.
A flat EEG for a continous period of 5 to 10minutes is
accepted as an evidence of death
11.
12. Early changes
Facial pallor & changes in
the skin: Due to stoppage
of circulation after death,
blood drains out of the
small vessels to big ones
& thereby face usually
appears pale.
13. Changes in the eyes
Dilated pupils,
Loss of corneal reflex
Retinal vessel
segmentation
Taches noire
Intraoccular tension
decreases
14. Algor Mortis
Postmortem Cooling
Most useful single indicator of the time of death
during the first 24 hours post mortem.
Useful only in cold and temperate regions.
Body temperature - 98.4oF
Rectal temperature - 99oF
Axillary temperature – 97oF
• Life is not possible below 27oC
• Not useful in tropical countries
16. Factors influencing Algor
Clothing and coverings.
Temperature of body at the time of death
Temperature difference between body and
environment.
Body built
Air currents and humidity
17. Livor Mortis
Lividity is a dark purple discoloration of the skin
resulting from the gravitational pooling of blood in the
veins and capillary beds of the dependent parts of the
body following cessation of the circulation.
The process begins immediately after the circulation
stops, and in a person dying slowly with circulatory
failure, it may be pronounced very shortly after death.
19. Lividity is first apparent about 20-30 minutes after
death as dull red patches or blotches which deepen in
intensity and coalesce over the succeeding hours to
form extensive areas of reddish-purple discoloration.
Slight Lividity may appear shortly before death in
individuals with terminal circulatory failure.
Conversely, the development of Lividity may be delayed
in persons with chronic anemia or massive terminal
hemorrhage.
After about 10-12 hours the Lividity becomes "fixed"
20. Rigor Mortis
Rigor mortis is the state a body reaches when the
oxygen supply to the muscles ceases but the cells
continue to respire anaerobically .
This causes lactic acid to build up, which affects the
muscles causing stiffening - rigor mortis.
Bodies become stiff after about three hours and remain
that way for around 36 hours (this is affected by
environmental and intrinsic changes).
Rigor mortis ceases as the body cells die, enzymes are
released and the cells decompose.
21. • If the body feels warm and flaccid, the body has been
dead less than 3 hours
• If the body feels warm and stiff it has been dead 3-8
hours
• If the body feels cold and stiff, it has been dead 8-36
hours
• If the body feels cold and flaccid it has been dead for
more than 36 hours.
23. Cadaveric spasm
Cadaveric spasm is a rare form of virtually
instantaneous rigor that develops at the time of death
with no period of post mortem flaccidity.
Muscles exhibit stiffening at the moment of death.
24. Cadaveric spasm
A victim of a
drowning case.
The victim was
recovered within a
short time, had
grass twigs or
vegetation from
the river bank
firmly grasped in
the hand.
25. Late changes
Postmortem decomposition : Also known as
Putrefaction
Putrefaction is the post mortem destruction of the soft
tissues of the body by the action of bacteria and
enzymes (both bacterial and endogenous).
Tissue breakdown resulting from the action of
endogenous enzymes alone is known as autolysis.
Putrefaction results in the gradual dissolution of the
tissues into gases, liquids and salts.
The main changes which can be recognized in the
tissues undergoing putrefaction are changes in color,
the evolution of gases, and fluids.
28. Adipocere formation
Saponification or adipocere formation is a modification
of putrefaction characterized by the transformation of
fatty tissues into a soft, yellowish-white, greasy, (but
friable when dry), wax-like substance, with a sweetish
odor.
It is first seen over areas of high subcutaneous fat.
It floats on water, and dissolves in alcohol and ether.
When heated it melts and then burns with a yellow
flame.
Ordinarily it will remain unchanged for years.
30. The medico-legal importance of adipocere lies not in
establishing time of death but rather in its ability to
preserve the body to an extent which can aid in personal
identification and the recognition of injuries.
The presence of adipocere indicates that the post
mortem interval is at least weeks and probably several
months.
31. Mummification
Mummification is a modification of putrefaction
characterized by the dehydration or desiccation of the
tissues.
The body shrivels and skin becomes dry ,leathery and
looks blackish brown,clinging to the body frame.
The internal organs also get dried and shrivelled up.
As the skin contracts some of the fat cells in
subcutaneous tissues are broken and liquid fat smears
in the dermis ,which becomes translucent.
A mumified body is practically odourless.
33. The forensic importance of mummification lies
primarily in the preservation of tissues which aids in
personal identification and the recognition of injuries.
The time required for complete mummification of a
body cannot be precisely stated, but in ideal conditions
mummification may be well advanced by the end of a
few weeks.
35. Forensic Entomology
• It is the study of insects and other arthropods for the
purpose of criminal justice.
Flies and maggots also provide an approximate time
of death, very useful for cases where the body has
been long dead. Only certain insects will feed and lay
eggs on a dead corpse and forensic entomologists
study these insects, their larvae cycles and thereafter
can determine whether a body has been dead for just
one day or up to 3 or 4 weeks.
37. References
Modi’s: Medical Jurisprudence & Toxicology; M. M.
Trirathi Press Ltd. Allahabad, 1988.
Vij Krishan (2001): Textbook Of Forensic Medicine And
Toxicology; B. I. Churchill Livingstone Pvt Ltd. New
Delhi.
Simpson, Keith: Forensic Medicine; The English Book
Society and Edward Arnold (Publishers) Ltd.
Encyclopedia Of Forensic Science; Vol 3.
library.thinkquest.org/04oct/00206/ta_time_since_de
ath.htm
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