12/10 Have out Fingerprint Comparison packet Get a ...
Transcript of 12/10 Have out Fingerprint Comparison packet Get a ...
December 14, 2016
12/10
Turn in Frank Abagnale Essay
Quiz on Fingerprint matching tomorrow
Absent Friday? need to do fingerprint matching worksheets
12/14 Have out Fingerprint Comparison packet - complete up to #8Get a whiteboard and marker for your group
HW: finish Fingerprint Comparison to #12 Quiz tomorrow on fingerprint matching - must know minutiae!
December 14, 2016
Answer on your whiteboard:1. Who identified the 9 different fingerprint patterns?2. What is the difference between an ulnar loop and a radial loop?3. Who developed the 10-card form of identification we still use today?4. How many minutiae are mapped for AFIS?5. What is the difference between IAFIS and SAFIS?6. Minutiae known as a fork is also a.....7. Who was first to use fingerprints in a murder case?
December 14, 2016
- photograph or take with you
-most common at a crime scene-invisible-made visible w/physical & chemical processing
-visible-made with blood, mud, grease, dirt-photograph or take object
-impression left on a soft surface like wax, clay, putty, soap, etc.-photograph or take a mold
-rolled on a 10-card at police station-changing over to scanned prints instead
Latent
Patent
InkedPlastic
(3-D)
p.12
December 14, 2016
Cyannoacrylate
-plastic, metal, glass-produces fumes in an enclosed container - sticks to oils in print; reacts with amino acids-white print-don't inhale fumes; wear gloves
a.k.a. superglue-nonporous
December 14, 2016
Ninhydrin
-paper, tissue, clothing-dissolve in acetone and spray material with suspected print - reacts with amino acids-purple print will appear in 24 hrs. -don't inhale or get on skin
porous
December 14, 2016
Dusting-glass, metal, plastic-dust is applied with a camel hair brush - sticks to sweat and oil-lift with tape and put onto a contrasting card-color varies depending on color of surface-only a little is needed!-don't inhale dust
nonporous
Contrast