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Thursday 8 March Topic: Footprints!

OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Thursday 8 March Topic: Footprints!. Do now: - What types of traits of a footprint do you think can be analyzed? (e.g. how long is the print?) What types of surfaces can have footprint evidence?

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Thursday 8 March Topic: Footprints!

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  1. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene Thursday 8 MarchTopic: Footprints! Do now: - What types of traits of a footprint do you think can be analyzed? (e.g. how long is the print?) What types of surfaces can have footprint evidence? What situations can you think of that would require footprint evidence analysis? NO HW! YAY!

  2. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Quick Recap… • 1 minute summary of the results of the ink chromatography lab: the blue ink smudged more • Blue wasn’t clear • Blue stains stopped • Some ink separated on both thingies • Polar/nonpolar means somehing

  3. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. When to analyze footprints?

  4. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Impressions Evidence • What is it? • Physical mark left on a surface • What are the 3 types? • Tool marks, foot, tire treads

  5. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Footprints – what to analyze: • Outsole impressions • left on an object due to contact with footwear • Walking on surfaces, kicking down a door, climbing over surfaces • Visible prints versus LATENT prints (have to use special materials to make the print visible)

  6. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Footprints – what to analyze: • Insole imprints • How the foot presses upon the inside of the footwear • Best with brands that are designed to mold to the foot

  7. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Footprints – what to analyze: • Trace evidence • Materials that can be transported from location to location via footwear • E.g. glass shards, fibers, blood, dirt, construction materials, etc.

  8. OBJECTIVE: You will be able to explain how footprint analysis is useful on a crime scene. Outsole Impressions • Measurements/observations to note: • Length • Width • Angle of impact • Weight distribution • Tread patterns • Identifying marks • Brand & type of shoe

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