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Fingerprints:Analysis and Understanding the Science
I: Fingerprint Analysis
The History of Fingerprints
Outline of the History of Fingerprints
Early Cases Resulting in the Acceptance of Fingerprints
Early Nonsystematic Methods of Identification
Study Questions
Systematic Methods of Identification
Bertillonage
Fingerprints
Definitions Associated with Fingerprints
Fingerprint Patterns and Ridge Characteristics
More Fingerprint Definitions
Study Questions
Fingerprint Pattern Types and Associated Terminology
Loop Pattern
Loop Ridge Counting
Radial and Ulnar Loops
Other Issues Pertaining to Loops
Plain Arch and Tented Arch Patterns
The Plain Arch
The Whorl Pattern
Plain Whorl
Central Pocket Loop Whorl
Double Loop Whorl
Accidental Whorl
Ridge Tracing and Counting Whorl Patterns
The Palm Print
Study Questions
Henry with FBI Extension
Ridge Count Conversion
Conversion Chart for Ridge Counts
Referencing
Filing Sequence
NCIC Classification System
IAFIS
Other Fingerprint Systems (Manual Methods or Systems)
Study Questions
II: Development, Identification, and Presentation of Fingerprints
Known/Direct/Inked Fingerprints: Processing Techniques for Unknown/Latent Fingerprints
Known Fingerprints
Manual Method
Unknown Fingerprints (Commonly Referred to as Latent Prints)
Conditions Affecting Latent Prints
The Crime Scene Search and Fingerprint Development
Fingerprint Development Techniques (see Appendix A)
Powder Techniques
Chemical Techniques
Fluorescent Powders
Cyanoacrylate Ester
Fuming or Tenting Method
CAE Wand Method
Iodine Fuming
Fuming Gun
Fuming Cabinet
Ninhydrin Method
DFO (1,8-Diazafluoren-9-one)/PD (Physical Developer)
,2-Indanedione Reagent
MBD
Nile Red Dye Stain
Oil Red O (ORO)
R.A.M. Dye Stain—Rhodamine, Ardox, and MBD
Rhodamine
Ardrox Dye Stain—Alcoholic Premix
Ardrox Dye Stain—Aqueous Premix
Basic Yellow 40 Dye Stain
Crystal Violet (Gentian Violet)
Sticky Side Powder®
Analogs That React with Blood
Coomassie Blue
Sudan Black
Blue Star
Fluorescein
Fingerprint Comparison and Identification
Study Questions
Court Preparation and Presentation
Preparation of the Exhibit
Courtroom Etiquette
Qualifying the Expert Witness
Courtroom Testimony
Presentation of the Exhibit
The historic case that allowed fingerprint evidence in the courtroom (People v. Jennings, 1911)
Review
Challenges to the Science of Fingerprints
Federal Rules of Evidence Rule 702
Study Questions
Appendix A: Techniques/Developers
Appendix B:
Protocol for Preliminary Examination
Expert Fingerprint Testimony—Preliminary Examination
Expert Fingerprint Testimony—Jury Trial
Appendix C:
Fingerprint Examination Report
Bibliography
Glossary
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