Fingerprint Unit: Final Group Activity

Transcription

1 Introductory Forensic Science 25 Fingerprint Unit: Final Group Activity Station #1: Station #2: Station #3: Station #4: M/C Questions = Pattern Recognition Latent Fingerprint Enhancement Exercize Fingerprint Pattern Identification Latent Fingerprint Enhancement Technique Questions Station #5: A Crime Scene Mystery (10 minutes allowed at each station) Names of Group Members:

2 Station #1: Multiple Choice Questions = Fingerprint Pattern Recognition 1. What is the most common type of fingerprint pattern? a) whorl b) loop c) arch 2. The road test will help you determine which type of fingerprint pattern? a) whorl b) loop c) arch 3. The radial bone is aligned with the little finger of your hand. a) true b) false 4. Which of the following patterns contains 2 or more combined patterns? a) plain whorl c) accidental b) tented arch d) double whorl 5. What is the least common type of fingerprint pattern? a) whorl b) loop c) arch 6. Which type of fingerprint pattern requires that you know which hand it came from before you can identify it? a) whorl b) loop c) arch 7. Every human has their fingerprint pattern since? a) puberty c) conception b) birth d) 2 year-old 8. Which of the following is NOT a type of whorl fingerprint pattern? a) concentric whorl c) central pocket whorl b) plain whorl d) accidental whorl 9. What percentage of the population exhibits the whorl fingerprint pattern? a) 6% b) 12% c) 34% d) 60% 10. How many types of loop fingerprint patterns are there? a) 2 b) 3 c) 4 d) 6

3 Station #2: Latent Fingerprint Enhancement Exersize Try to to enhance the fingerprints placed on each item at this table and then answer the related questions. ****************************************************************** Item A = Wine glass 1. What technique did your group use to enhance the fingerprint on this item? 2. How many fingerprints did your group find on this item? 3. Identify the specific patterns of each of the fingerprints that you found on this item (assume the prints are from the RIGHT hand): ****************************************************************** Item B = Ransom Note 1. What technique did your group use to enhance the fingerprint on this item? 2. How many fingerprints did your group find on this item? 3. Identify the specific patterns of each of the fingerprints that you found on this item (assume the prints are from the RIGHT hand): ******************************************************************

4 Station #3: Fingerprint Pattern Identification LABEL each of the following fingerprint patterns - assume each print comes from the LEFT hand.

5 Station #4: Latent Fingerprint Enhancement Technique Questions 1. What are lifting powders mainly comprised of? 2. What should an individual try not to do when working with lifting powders? 3. What type of objects are used to apply lifting powders? 4. What is the over-all charge of lifting powders? 5. What is the over-all charge of body oil residue? 6. Identify the specific type of ionic compound that causes sweat to be salty? 7. What type of chemcial reaction causes iodide ions to displace the chloride ions in sodium chloride? 8. Name one object that the iodine fumingation fingerprint enhancement technique would work best upon? 9. Iodine fumigation must take place in what type of object? 10. What starts to happen to a fingerprint that appears after iodine fumingation? 11. What is another name for cryanoacrylate? 12. When an object is exposed to cryanoacrylate fumingation - what does the cryanoacrylate stick to? 13. What color is the latent fingerprint that is exposed after cryanoacrylate fumingation? 14. Name one object that the cryanoacrylate fumingation fingerprint enhancement technique would work best upon? 15. How long does it often take for a latent fingerprint to appear after cryanoacrylate fumingation?

6 Station #5: A Crime Scene Mystery At 9:35 pm on Friday March 8, 2002 two suspects both wearing Barney the Dinosaur masks walked into the Royal Bank in Morinville. One of the suspects passed a threatening note to a bank clerk that demanded money. The bank clerk did as she was told and began passing bills to the suspects. One of the suspects then began to frantically shove the money into a bag... as she/he was doing this he/she accidentally dropped a couple piles of bills held together with a bull clip onto the floor. The other suspect, who was keeping watch, frantically began picking up these piles and shoved these back into the money bag - however he/she inadvertently forgot a bull clip and a single bill on the floor. After the clerk filled the money bag - both suspects drew their guns and ordered everyone in the bank to drop to the floor. The suspects then walked out of the bank and proceeded east. When the RCMP arrived (5 minutes later) - the suspects were long gone. However, they began getting statements from witnesses in the bank as well as when they canvased local businesses. When officers arrived at Friends & Neighbors restaurant - one of the waitresses said that that two suspicious-looking males had come in around 9:00 am - ordered and left abruptly around 9:20 am (without leaving a tip!?!). The waitress even pointed out the table that the two suspects had eaten at... luckily because it was busy in the restaurant that morning the dishes had not yet been cleared from the table.

7 CONCLUSION: Station #5: A Crime Scene Mystery Evidence Sample #: Description of Evidence: Name of Technique Used: Name of Fingerprint Patterns observed : Right Thumb = Right Index = Name(s) of Suspects Responsible: Evidence Sample #: Description of Evidence: Name of Technique Used: Name of Fingerprint Patterns observed : Right Thumb = Right Index = Name(s) of Suspects Responsible:

8 Evidence Sample #: Description of Evidence: Name of Technique Used: Name of Fingerprint Patterns observed : Right Thumb = Right Index = Name(s) of Suspects Responsible: Evidence Sample #: Description of Evidence: Name of Technique Used: Name of Fingerprint Patterns observed : Right Thumb = Right Index = Name(s) of Suspects Responsible:

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