FORENSICS
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Transcript of FORENSICS
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FORENSICS
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RELATING TO OR USED IN LEGAL PROCEEDINGS OR ARGUMENTATION
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What does “FORENSIC” mean?
Comes from Latin forens
Which comes from forum Forum—ancient Roman gathering
place for legal and public business
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MEDICAL EXAMINER
All sudden or unexpected deaths and all deaths that may be due entirely, or in part, to any factor other than natural disease must be reported to the ME for evaluation
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AUTOPSY
CAUSE OF DEATH NATURAL HOMICIDE SUICIDE ACCIDENT UNDETERMINED
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TOXICOLOGY
STUDY OF POISONS
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RIGOR MORTIS
MANIFESTS WITHIN THE FIRST 24 HOURS
DISAPPEARS WITHIN 36 HOURS
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MUSCLES BECOME RIGID
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LIVOR MORTIS
BLOOD SETTLES IN PARTS OF THE BODY CLOSEST TO THE GROUND
APPEAR DARK BLUE OR PURPLE
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ALGOR MORTIS
COOLING OF THE BODY
INFLUENCED BY FACTORS OF THE ENVIRONMENT
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BLOOD STAIN PATTERN ANALYSIS
A DROP OF BLOOD WILL FORM A PERFECT CIRCLE UNTIL SOMETHING HAPPENS TO IT
INTRODUCE AN ANGLE AND IT BECOMES A TEAR DROP SHAPE
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WHAT CAN IT TELL YOU?
Position of victim/suspectEvidence of a struggleAreas where blood isn’tSequence of events—body moved?How many impacts and from what
directionWas scene altered?
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Whether stains or patterns are consistent with statements
May determine other information that eliminates other avenues of investigation
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DIRECTION OF TRAVEL
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TARGET SURFACE
SURFACE CAN CHANGE BLOOD SPATTERING
LOW VELOCITY SPATTER—WOUND ON ARM DRIPPING
MEDIUM VELOCITY SPATTER—BLUNT TRAUMA
HIGH VELOCITY SPATTER--GUNSHOT
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FORENSIC ANTHROPOLOGY
IDENTIFICATION OF THE HUMAN SKELETAL REMAINS
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WHAT CAN BE DETERMINED?
AGE AT DEATH
SEX OF SKELETON
RACE AND STATURE
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FORENSIC ENTOMOLOGY
STUDY OF INSECTS
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90 species of blow-flys will find a body with minutes
Entomologists understand bugs life cycle and calculate the time required to get to those stages to determine time of death
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FORENSIC PSYCHIATRY
THE RELATIONSHIP BETWEEN HUMAN BEHAVIOR AND THE LAW
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FORENSIC ODONTOLOGY
TEETH ARE COMPOSED OF ENAMAL, THE HARDEST SUBSTANCE IN THE BODY
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HOW MANY TEETH DO WE HAVE??
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ADULT-------32
CHILD-------20
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ANATOMY OF A TOOTH
CROWN
NECK
ROOT
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FORENSIC ENGINEERING
FAILURE ANALYSIS, ACCIDENT RECONSTRUCTION, CAUSES OF FIRES OR EXPLOSIONS
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“YOU ONLY GET ONE CHANCE TO DO IT RIGHT THE FIRST TIME, SO YOU’D BETTER DO IT RIGHT. IN SHORT, IF YOU THINK OF IT—DO IT—OR HAVE A GOOD REASON WHY YOU DIDN’T. BECAUSE IF YOU DON’T, SOMEONE—WHO GETS PAID CONSIDERABLEY MORE THAN YOU AND BY THE HOUR—WILL ASK WHY
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YOU DIDN’T. AND A JURY WILL BE WATCHING”