PROFICIENCY QUIZ 1. You are at a crime scene investigating a robbery. You dust the area and find two good prints. One is a Radial Loop and the other is a Tented Arch. A rookie officer at the crime scene isn t sure how to recognize these two different prints so you decide to make a sketch of each for him/her. Sketch out an example of these two prints (in the spaces provided on your answer sheet) so the rookie can identify each. 2. The three RIGHT fingerprints below were discovered at a crime scene and need to be classified. Write the correct Classification of each print on your answer sheet. Print A Print B Print C 3. Explain the difference between Class Evidence and Individual Evidence. Give an an example of each. 4. Draw a fingerprint ridge on your answer sheet that contains a Bifurcation, an Enclosure, and a Ridge Ending and correctly label each. 5. Go to a Fingerprint Dusting Station and complete the following (you will be graded on your ability to dust and lift a latent print). Your lifted print should be clear and easily identifiable: A. Place a latent thumbprint on a clean glass slide (you can use your thumbprint or ask for your supervisor s thumbprint) B. Dust and lift the latent print with the supplied materials. C. Tape the lifted print on your answer sheet. If you don t like the quality of your lifted print you can try again. D. Clean your slide and the Dusting Station for the next person. 126
6. Identify the Classification of the print you dusted and lifted in Question #5. 7. You have a piece of paper evidence from a crime scene. You decide to use Iodine fumes to develop any prints that might be present on the paper. You safely use Iodine and discover three perfect fingerprints on the paper that match your suspect. Now all you have to do is present this evidence in court next week. However, there is one major problem you will encounter when you try to use your Iodine developed prints in court. Describe this problem. 8. You need to test the ink used to write a note using Paper Chromatography. Unfortunately, you just discovered that you have run out of the SOLVENT needed for Paper Chromatography so you decide to order some more. What chemical solvent do you need to order to perform Paper Chromatography? 9. Paper Chromatography is completed on an ink sample from a suspect s pen. The ink divides into TWO separate colored chemicals a blue color and a red color. You have calculated the Rf values of the two ink chemicals and found the following results: Blue Colored Chemical Rf Value = 0.5 Red Colored Chemical Rf Value = 0.9 Locate the empty chromatography strip on your answer sheet and accurately draw where the BLUE and RED chemicals were located on the strip after chromatography was completed (use blue and red colors OR neatly label which chemical is blue and which is red). 10. You pick up a ransom note from a crime scene and begin your search for clues. You decide to first look for the presence of watermarks. Describe what a watermark looks like and then describe a good method to help you find watermarks on the paper. 127
11. Below is an evidence thumbprint that was dusted and lifted from a crime scene. EVIDENCE THUMBPRINT Which suspect below matches the evidence thumbprint? SUSPECT A SUSPECT B SUSPECT C SUSPECT D SUSPECT E 12. A patent shoe print was left behind at a crime scene. You measure the shoe print and find it is 10 inches long. Use the formula to determine the approximate height of the suspect. Y = 3.2X + 33 (do NOT use your own formula for calculating height) 13. How does a Patent Shoe Print, like the one described in Question #12, get left behind at a crime scene? 128
PROFICIENCY QUIZ FORENSIC SCIENCE NAME 1. Radial Loop Tented Arch 2. Print A Print B Print C 3. 4. 5. Tape lifted print(s) here 6. 129
7. 8. 9. Solvent Distance 10. 11. Suspect matches the evidence print. 12. Suspect s Height is about feet and inches. 13. 130