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?

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

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: http://www.stampmatch.com/results.html and http://www.fosterfreeman.com/products/shoeprints/solemate/solemate.html

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

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.

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.

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.

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.

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.

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: http://www.suite101.com/view_image.cfm/454216, http://www.ronsmithandassociates.com/FWTTS.htm.

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.

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

Identifying A Vehicle 14

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.