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Name ___________________________________________ Date _______________ Bite mark analysis - PowerPoint PPT Presentation


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Name ___________________________________________ Date _______________ Bite mark analysis Go to http:// www.leikerforensics.wikispaces.com . Click on “Class activity links” on the left. Click on “Bite mark analysis”

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Name ___________________________________________ Date _______________

Bite mark analysis

Go to http://www.leikerforensics.wikispaces.com. Click on “Class activity links” on the left.

Click on “Bite mark analysis”

1. Read through the first few paragraphs and describe three reasons why bite marks are a difficult piece of evidence to use.

1. _____________________________________________________________________________________

___________________________________________________________________________________

2. _________________________________________________________________________________

___________________________________________________________________________________

3. _________________________________________________________________________________

____________________________________________________________________________________.

There are four steps the forensic dentist does when a bite mark is part of crime scene evidence. Name these.

1. _________________________________________________________________________________

2. _________________________________________________________________________________

3. _________________________________________________________________________________

4.__________________________________________________________________________________

What does this mean? “The victim was found with an abrasion on the left leg, a hemorrhaging bite, and an avulsion. ____________________________________________________________________

_________________________________________________________________________________

Click on “Bite mark cases”

2. Scroll down and read the case about Ray Krone.

What was Ray accused of? ___________________________________________________________

What specific evidence was used to convict him of his crime? _______________________________

_________________________________________________________________________________

What evidence helped overturn the case? _______________________________________________

What does this case prove about bite mark evidence? _____________________________________

_________________________________________________________________________________

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Click on odontology activities.

Click on DNA Extraction Activity on the left.

When will the odontologist turn to DNA to identify a victim? _______________________________________________________________________________________________________________________

When looking at each step, be sure to use the arrow over button to see all the information.

STEP ONE: Find DNA

What part of the tooth is generally used to get DNA from? ________________________________________

STEP TWO: Extract DNA

What are the three steps in getting the DNA out of the tooth?

1. ________________________________________________________________________________ 2. ________________________________________________________________________________ 3. ________________________________________________________________________________

STEP THREE: Multiply DNA

What is polymerase chain reaction? __________________________________________________________

________________________________________________________________________________________

STEP FOUR: Results

When DNA is pushed through the gel to create the DNA profile, how are the DNA pieces positioned? _____________________________________________________________________________________________

STEP FIVE: Identify

How do you know when a DNA profile is a match? ______________________________________________________________________________________________________________________________________