1. Warm Up
Objective: Scientists will describe other impression evidence by analyzing the activities.
What is the topic?
What will you be doing?
Why is this important?
How will you know if you have done well?

2. Warm Up
Objective: Scientists will describe other impression evidence by analyzing the activities.
What is the topic? Impression evidence
What will you be doing? analyze activities
Why is this important? Evidence; future career
How will you know if you have done well? Able to describe impression evidence; analyzed activities

3. Shoe Print Evidence
Investigators can analyze a shoe print to determine its class, or the type and brand of shoe. They will also look for individual characteristics, such as wear patterns and specific damages or defects.
Depending on the quality of the impression, investigators may be able to determine a person’s speed (walking vs. running) as well as estimate the size of a person based on the impression’s depth.
Features to analyze:
Tread patterns, size, and depth
Wear patterns caused by the way a person walks
Material defects or damage (nicks, cuts, etc.)
Other trace materials, such as soil, tar, rocks, and paint that would indicate where a person has been
Images: and

4. Shoe Print Database
Databases contain the names of specific manufacturers and tread patterns used to identify different types of shoes.
Crime-scene investigators can search the databases to find:
The manufacturer that produced the sole pattern
The company that purchased the sole for the shoes
If a large number of manufacturers use the same generic sole patterns, it complicates sole identification. 4

5. Shoeprint Activity
Examine the cast and photograph of the shoeprint found at the crime scene. Write your observations/measurements.
Observe the impression, sole, and side view of each suspect.
Which suspects can be immediately eliminated? Why would you eliminate those?
Which suspect’s shoes were found at the crime scene? Explain how you came to this conclusion.
Does the presence of the suspect’s shoeprint at the crime scene guarantee that the suspect committed the crime? Explain your reasoning.

6. Shoeprint Activity
Examine the cast and photograph of the shoeprint found at the crime scene. Write your observations/measurements.
12 inches long, pattern is worn on the heel and toe, repeating squares/rectangles with circles or lines
2. Observe the impression, sole, and side view of each suspect.
Which suspects can be immediately eliminated? Why would you eliminate those?
Which suspect’s shoes were found at the crime scene? Explain how you came to this conclusion.
Does the presence of the suspect’s shoeprint at the crime scene guarantee that the suspect committed the crime? Explain your reasoning.

7. Shoeprint Activity
Examine the cast and photograph of the shoeprint found at the crime scene. Write your observations/measurements.
12 inches long, pattern is worn on the heel and toe, repeating squares/rectangles with circles or lines
2. Observe the impression, sole, and side view of each suspect.
Which suspects can be immediately eliminated? Why would you eliminate those?
Pattern is NOT the same. (Be sure to write a few names/shoes that you eliminated).
Which suspect’s shoes were found at the crime scene? Explain how you came to this conclusion.
Does the presence of the suspect’s shoeprint at the crime scene guarantee that the suspect committed the crime? Explain your reasoning.

8. Shoeprint Activity
Examine the cast and photograph of the shoeprint found at the crime scene. Write your observations/measurements.
12 inches long, pattern is worn on the heel and toe, repeating squares/rectangles with circles or lines
2. Observe the impression, sole, and side view of each suspect.
Which suspects can be immediately eliminated? Why would you eliminate those?
Pattern is NOT the same. (Be sure to write a few names/shoes that you eliminated).
Which suspect’s shoes were found at the crime scene? Explain how you came to this conclusion.
Nike Air Max Tailwind. Larry Greztky. Photograph/impression matched the suspect.
5. Does the presence of the suspect’s shoeprint at the crime scene guarantee that the suspect committed the crime? Explain your reasoning.

9. Shoeprint Activity
Examine the cast and photograph of the shoeprint found at the crime scene. Write your observations/measurements.
12 inches long, pattern is worn on the heel and toe, repeating squares/rectangles with circles or lines
2. Observe the impression, sole, and side view of each suspect.
Which suspects can be immediately eliminated? Why would you eliminate those?
Pattern is NOT the same. (Be sure to write a few names/shoes that you eliminated).
Which suspect’s shoes were found at the crime scene? Explain how you came to this conclusion.
Nike Air Max Tailwind. Larry Greztky. Photograph/impression matched the suspect.
5. Does the presence of the suspect’s shoeprint at the crime scene guarantee that the suspect committed the crime? Explain your reasoning. NO. Anyone could own/wear that shoe. Could have been there before the crime was committed. Shoes could have been stolen.

10. Tire Track Evidence
Tire tracks are important in forensic investigations and are usually found in road accident scenes or in the access and escape routes of other crime scenes.
Tracks help investigators identify the type of vehicle that left them.
Investigators may make ink prints of a tire or plaster casts of a track.
They will also take photographs that can later be used to prove a match.
Images:

11. Tire Track Analysis Features to analyze: Tread pattern
Width & depth of the tread pattern
Unique characteristics due to the wear pattern or defects
Tire databases are available help investigators determine the brand and model of the tire that left the impression , which can be used to determine the type of vehicle that made the tracks.

13. Recording Tread Impressions
Tread area- the part of the tire that meets the road
Rib- an individual ridge of tread around the tire
Groove- a depression in the tread 13

14. Identifying A Vehicle 14

15. Tire Tracks Activity
Using the ink pads, create a track in the appropriate box.
Indicate measurements (space between tires in all directions)
Which car was at the crime scene?
How do you know?
Does the presence of the suspect’s car tracks at the scene of a crime guarantee that they did the crime? Explain your reasoning.