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Terms in this set (46)
causes of death
Blunt force trauma
Sharp force trauma
manner of death
temp - 1.5 deg. F per hour until equilibrium
blood pooling to areas closest to ground
24-36 hrs - shortening of muscle tissue; stiffening of body parts
Stages of decomposition
Preservation methods for cadaver insects
hot liquid; or 50-70% ethanol
Live specimens: kept in container with airholes. Why?
To let them grow into adult stage at the lab for species identification.
What kind of information can be obtained from cadaver insects?
If drugs were in the deceased's system,
if a sex crime occurred (DNA present),
location of wounds (defense?),
geographical location and time of death
What is the succession of insects that arrive on a dead body?
Blowflies/maggots (to lay eggs and eat dead tissue)
Beetles (to eat the maggots)
Ants and wasps (because they are boss)
canning body for wounds, possible cause of death, scars, markings (tattoos), fingernail scrapings, combings, buccal swabs.
how to know if someone died from basel skul fracture
bleeding from ears
if someone has petechiae they most likely died from what cause of death?
how to know if someone died from internal head injuries?
Y section incision to expose core organs. Organs are weighed and sampled (fluids, serology to check for drugs, poisons, changes in body chemistry)
why is an adult blowfly specimen preserved at crime scene?
to determine species and development stage
how many degrees does the body change after death over what time period?
1 - 1 1/2 F per hour till body reaches room temp
what can the stage development of a blowfly be effected by?
geographical location, climate, weather condition, presence of drugs
what is negative photographs
pictures of uninjured areas of a victims body
primary cause of a autopsy
cause of death
pathologist will carefully examine the decendent to establish victim...
identity, cause and manner of death
items collected during external examination
combing of head and pubic hair
vaginal, anal. oral swabs
bullets recovered from body
hand swabs from shooting victum
what is toxicology
collect blood, stomach contents, bile, urine specimen
what is blood tested for?
determine precense and level of alcohol and drugs
what is blunt force trauma
caused by "non sharp" or "blunt" object
what is asphyxia?
inference of the intake of oxygen
What is forensic anthropology?
identification and examination of human skeletal system
what is forensic entomology?
study of insects and the relation to criminal investigation, commonly used to determine time of death
wear should blood be taken from
areas of body with least contamination
inferior vena cava (large vein inside lower abdominal region, which recieves its blood from the femoral veins)
what is petechiae
small, caused by blood escaping into tissues as a result of capillaries bursting
time of death methods
insect life stage/ development
life cycle of blowfly
larva 1,2,3 (maggot)
insect succession on corpse
kind of information can be obtained from cadaver insects?
presence of drugs
if it was sex crime (dna)
location of wounds
location of environment
when does liver mortis occur?
begins 20 minutes to 3 hours on death and continues for 16 hours
when does riger mortis occur?
24 - 36 hours after death
what can skeletal system reveal?
injury of bone
difference of pelvic bone between male and female
female pelvic bones tend to show wider more circular than male pelvis due to reproduction system of carring baby
can height be determined by bones?
what can skeletal system create?
can create facial reconstructions to identify skeletal remains
what is PMI
post mortem interval
what are paper bags used for?
placed over hands at crime scene until time to examine
what is stippling/tattooing
discharge of soot and gun powder
what can examination of liver and lungs confirm
chronic intravenous drug abuse
what is pulmonary edema
fluid accumilation in lungs
wear to drugs redistribute to
reenter blood after death and thus may complicate the interpretation of postmortem blood levels of these drugs
THIS SET IS OFTEN IN FOLDERS WITH...
Securing and searching the crime scene
securing a crime scene
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