Objectives:. Students will be able to compare and perform fingerprint detection techniques. SWBAT describe the historical and current methods for fingerprint matching. Do Now: Update your exit ticket tracker!
Update your exit ticket tracker!
1.Explain the history of the fingerprint system so far. (Bertillonage system to Henry classification system)
2. What is the difference between a latent, plastic and patent print?
3. Why might a detective need to use a power test on a crime scene?
3. If 65% of fingerprints have loops, how are fingerprints considered individual evidence?
Finishing the unit: Why are we learning about fingerprints? What does that have to do with Forensic Science?
Types of fingerprints
The Henry Classification System uses:
a. The amount of whorls on your index fingers to calculate a number
b. The presence of whorls on all ten fingers to calculate a number
Turn and Talk: Why would the Henry Classification System fail?
Automated Fingerprint Identification System
Modified Henry Classification system System
A better method of storing, retrieving, and matching fingerprints using 10 print system
Digitally encodes fingerprints
SWBAT describe, compare, and perform fingerprint detection techniques. SWBAT describe the historical and current methods for fingerprint matching
Powder Testing– powder attaches to oils
Iodine- attach to oils from fingers
Ninhydrin - reacts with amino acids (proteins)
Silver nitrate- reacts with salt
Students will be able to describe, compare, and perform fingerprint detection techniques.
A. Latent B. Patent C. Plastic D. Paint