Impressions. Objective: bite marks Do Now: Do you think bite marks are class or individual evidence?
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Transcript of Impressions. Objective: bite marks Do Now: Do you think bite marks are class or individual evidence?
![Page 1: Impressions. Objective: bite marks Do Now: Do you think bite marks are class or individual evidence?](https://reader030.fdocuments.in/reader030/viewer/2022012908/56649ce45503460f949b0cc7/html5/thumbnails/1.jpg)
Impressions
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Objective: bite marks
Do Now: Do you think bite marks are class or individual evidence?
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Impressions
Impressions are created when…• one object is pressed against
another material with enough force to leave an impression or imprint of the object.
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Examples of Impressions
Bite Marks, shoeprints, tire tracks etc.
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Bite Marks
Individual evidence**
Investigators can analyze bite mark for the following:
Characteristics of the teeth (position, evidence of dental work, wear patterns, etc.)
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Saliva or blood (DNA)
When the bite occurred
http://www.youtube.com/
watch?v=thfHB5e51q8
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Case Study: Ted Bundy
Complete the case study on Ted Bundy.
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Computer Generated Overlays
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Closure:
How did bite marks play a role in catching Bundy?
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Video case study: Ted Bundy
http://www.youtube.com/watch?v=zriSw1UBqv8
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Objective: bite mark lab
Do Now: What characteristics of bite marks can make them easily identifiable?
Complete the bite mark lab
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Closure:
What suspect was the killer in the case?
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Objective: Shoe prints
Do Now: Are shoe prints class or individual evidence?
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Shoe Prints
Investigators can analyze a shoe print to determine its…• Class, or the type and brand of shoe
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Individual characteristics, such as wear patterns and specific damages or defects
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How to obtain shoeprints?
Photograph
Dusting (2-D print)
Casting (3-D print)
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Case study: OJ and Shoeprints
http://www.youtube.com/watch?v=kz1rrpoESa0
Complete O.J. Simpson shoeprint case study
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Answers to OJQuestions
1. Class because his shoes were never found
2. No matches in FBI database
3. Answers will vary (opinion)
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Closure
How did the shoeprint examiner determine the manufacturer of the shoeprint left at the scene?
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Objective: Shoe Prints
Do Now: What characteristics could make shoe prints individual evidence?
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Objective: shoe print lab
Complete shoe print lab