Evidence Sheets. Fingerprint #1 Fingerprint #2 Fingerprint #3 Fingerprint #4 Fingerprint #5

Transcription

1 Evidence Sheets Name: EXHIBIT A: FINGERPRINTS The following fingerprints were found at the crime scene Fingerprint #1 Fingerprint #2 Fingerprint #3 Fingerprint #4 Fingerprint #5 Description: Description: Description: Description: Description: A. Read the attached handout Fingerprint Identification. B. In the table above, describe the characteristics of each of the five fingerprints in terms of arches, loops, & whorls. C. Compare each suspect s fingerprints (see Suspect Profiles) with those found at the crime scene. D. Fill in the name of each suspect beside the matching fingerprint on the table above. E. When time permits, use the Fingerprint Strips to make a print of your right thumb in the box at the bottom of the page. Share- one strip total per group. F. Record observations about your right thumb print in the spaces below. Your Right Thumb Print Observations: 1) 2) 3) 4)

2 EXHIBIT B: PET HAIRS Two types of pet hairs were found at the crime scene. The first officer at the scene made the following observations. 1) The hairs of two different types of pets were found. 2) Both dog and cat hairs were confirmed to be present. A. Read the instructions for using the microscope on EXHIBIT B. B. Examine both the dog and the cat hairs on the highest magnification. C. Make observations draw and describe each type of pet hair below. D. Answer the questions below. Cat Hair Dog Hair Description: Description: Magnification: x Magnification: x 1) In what ways are cat hairs different from dog hairs? 2) How could the dog hairs have gotten to the crime scene?

3 EXHIBIT C: SHOE PRINTS Smudges of shoe prints were found outside of back door beside the crime scene. The first officer at the scene made the following observations. 1) Someone appeared to have wiped his/her feet on the mat outside the door. 2) No clear shoe prints could be distinguished. 3) The best shoe print measured was possibly 8-10 inches long. A. Read and carefully examine EXHIBIT C. B. Answer the questions below. 1) Are the shoe prints found on the doormat at the crime scene a strong piece of evidence that can clearly identify the perpetrator of the crime? Why or why not? (explain) 2) What information can be learned from the shoe print evidence found at the crime scene? (explain) 3) Propose an explanation for the three observations made by the first officer regarding the shoe prints found at the crime scene. 4) Look at the shoe prints made from the shoes worn by the suspects on the day of the crime. Do these shoe prints provide strong evidence that can clearly identify the perpetrator? Why or why not? (explain) 5) What information can be learned from the shoe prints made from the shoes worn by the suspects on the day of the crime?

4 EXHIBIT D: TIRE PRINTS The following tire prints were found outside of the crime scene Tire Print #1 Tire Print #2 Tire Print #3 Tire Print #4 Tread Width: 6.5 in Tread Width: 8.5 in Tread Width: 10 in Tread Width: 9.5 in Car Type: Compact Car Type: SUV Car Type: Truck Car Type: Limo A. Read and carefully examine EXHIBIT D. B. Answer the questions below. 1) Review the Suspect Profiles. What information regarding the suspects can be inferred from the tire print evidence found outside the crime scene? (explain) 2) What information regarding the perpetrator of the crime can be learned from the tire print evidence found outside the crime scene? (explain) 3) Are the tire prints found outside the crime scene a strong piece of evidence that can clearly identify the perpetrator of the crime? Why or why not? (explain) 4) Explain how the tire print evidence could be used to help solve the crime.

5 EXHIBIT E: BLOOD DNA Smudged blood drops were found on the floor of the crime scene. The first officer at the scene made the following observations. 1) Someone appeared to have cleaned up the blood drops. Trace amounts of DNA were collected. 2) The DNA was digested with EcoR1 restriction enzyme which chops the DNA into fragments. 3) Gel sequences are shown below including the perpetrator and the suspects whose DNA is on record. A. Read and carefully examine EXHIBIT E. B. Use the portable UV light to examine the blood stains present at the crime scene. Click on the UV lamp (it should glow purple) and hold it close to the ground and/or other surfaces around at the crime scene. Blood stains and residues will fluoresce (glow). When finished turn off the UV light and return it beside EXHIBIT E. C. Answer Questions #1-2 below. D. DNA evidence was collected from the blood stains. When chopped up by a restriction enzyme such as EcoR1 and run on an agarose gel, each person s DNA makes a distinct pattern of lines. Each line corresponds to a single DNA fragment. Look at the patterns for each person s DNA shown in EXHIBIT E. E. Answers Questions #3-5 below. 1) While examining the crime scene for blood stains using the UV light, what observations did you make? 2) What information regarding the crime can be learned from the blood evidence found at the crime scene? (explain) 3) What information regarding the suspects (whose DNA is on record) and perpetrator of the crime can be learned from the DNA sequence evidence found at the crime scene? (explain) 4) Is the blood DNA evidence found outside the crime scene a strong piece of evidence that can clearly identify the perpetrator of the crime? Why or why not? (explain) 5) Explain how the blood DNA evidence could be used to help solve the crime..