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F. EntomPMIMisc. 10 Point20 Points30 Points40 Points50 Points10 Point 20 Points 30 Points40 Points50 Points30 Points 40 Points 50 Points F. AnthroF. Path

Name 5 manners of death

Homicide Suicide Natural causes Accidental Unknown

Name three factors that can affect the estimation of PMI

Weather conditions Clothing on the body Body covered or not Location- inside or outside Drugs

Evidence of tampering with the position of the body after death can be obtained by…

Livor mortis

If the cause of death cannot be determined by simple observation of the victim, what procedure is preformed?

Autposy

What is the typical rate of heat loss after death (before and after 12 hrs), and when does the body stop losing heat?

1.4 degrees an hour for the first 12 hours 0.7 degrees an hour every hour thereafter Stops when it’s the same temp as the environment

What does “entomology” refer to?

The study of insects

Name three insects usually found on a dead body…

Blow fly Flesh fly House fly Skipper fly Beetles

When should insect evidence be collected… During the autopsy, At the scene, or At the crime lab

At the scene

Which is typically the first “witness” (fly) to the crime scene? When might this not be the case?

Blow fly Well-sealed house; underwater

Name the 4 stages of the life cycle of an insect.

Eggs Larva Pupa Adult

Found at the scene on the victim’s body: Flesh fly: L mm House fly: L Blow fly: L Estimate PMI…

10-11 days

Which part of a body is left behind after rapid decomposition?

Bones

Name 2 bones of the human body that provide clues to gender?

Pelvis & Skull

If you are looking at the state of fusion of bones, what are you trying to determine?

Age

Name 2 skull features you would look at to determine gender…

Brow ridges Shape of jaw Shape of forehead Mastoid process

What is rigor mortis and where does it start?

The stiffness of mucles after death; Starts in the eyes and face.

What is algor mortis?

Using body temp to determine PMI.

A dead body of an elderly gentleman was discovered in an abandoned building. Blowfly pupae were found on the body. A missing person’s report was filed for an elderly gentleman who had wandered away from home just two days before. The body found was similar in age, height, and weight to the missing person. Could this possibly be the same person as the person described in the missing person’s report? Explain your answer.

The insect evidence of pupa cases indicates that the body found in the abandoned building had been there at least 8 to 12 days. The missing person’s report indicated that the man they were looking for had been missing just the last two days. Therefore, based on insect evidence, the man in the abandoned building could not be the same man who was reported missing.

Estimate PMI: A body with most muscles relaxed except for face; obese person, outside on a cold night

4-5 hours Weight and cold temps slow rigor, making it a longer PMI

Estimate PMI: Body is completely stiff, found in a hotel room with a temp of 95 degrees

Peak rigor ~ 12hrs, however, room is very warm, accelerating rigor. Move time up, ~ 8-10 hrs.

What is PMI?.

Post mortem interval (the amount of time since death)

A female corpse was found partially submerged on the shore of a lake. The air temperature was 81°F, and the water temperature was about 61°F. Rigor mortis was not evident, and the body’s temperature was 61°F. Livor mortis showed a noticeable reddening on the victim’s back that did not disappear when pressed. Determine PMI…

36 to 43 hours prior to the discovery of the body

Approximately how long has the victim been dead if his body temperature was 91.5°F? What would you see in terms of RM or LM?

~ 5.07 hrs (5 hrs, 2 min) RM: stiffness in eyes, face, neck arms, maybe starting in legs. LM: has started, but not set

What is the approximate time of death if the body temperature was 50°F? What bug evidence might you see? What stage of decomposition is the body in?

~ 57.4 (57 hrs, 24 min) Maybe: house fly eggs, blow fly and flesh fly larva Decomp: Fresh, initial decay (0-3 days)

Create a scenario with a ante-, peri- and postmortem injury. Identify each.

Ante- before Peri- during Post- after

Final Jeopardy Make your wager

Estimate the height of these 2 people in feet and inches: 1.Caucasian male, femur, 50.6cm 2.African-American female femur, 49.5cm

1.6’ 2” 2.5’ 8”