Physical & Chemical Processing of Latent Print Evidence

Instructor: Jennifer Peterson
Course length: 40 hours

The Physical & Chemical Processing of Latent Print Evidence course includes comprehensive training in evidence collection and physical and chemical processing of latent print evidence as well as latent print photography. The course will provide both lecture material and hands-on practical exercises.

Course Topics Include:

Introduction to the anatomy and physiology of latent prints and latent print residue
Major case prints and postmortem exemplars
Latent print evidence collection practices related to specific forensic disciplines
   - firearms
   - digital forensics
   - fire investigation
   - biological evidence
   - questioned documents
Personal protective equipment laboratory safety
Case file management, documentation, and pre-processing evidence photography
Latent print processing: Porous and Non-Porous
Latent print processing: Special Circumstance
   - fire debris
   - human skin
   - wet surfaces
   - tape adhesive
   - greasy surfaces
Latent print processing: Blood
Forensic light sources and latent print photography

Latent Print Development Methods Include:

1,2 Indanedione
DFO
Ninhydrin
Cyanoacrylate
Rhodamine 6G
Ardrox
RAM
Basic Yellow/Basic Red
Fingerprint powders: Black, Magnetic, and Fluorescent
Acid Yellow 7
Amido Black
Leucocrystal Violet
Coomassie Blue
Crystal Violet
Small Particle Reagent
Sudan Black

At the conclusion of the Physical & Chemical Processing of Latent Print Evidence course, the student should know how to maintain the integrity of latent print evidence from the crime scene to the laboratory, understand the physiological components of latent print residue, and recognize the appropriate latent print processing technique(s) calculated by matrix, substrate, and environmental considerations.

The student will learn how to preserve the latent print evidence using forensic light sources, advanced photography techniques, and proper image storage practices.

The student will be able to testify in court with more confidence when describing their decisions in evidence collection and evidence processes completed.

This course has been approved for 40 hours of certification/recertification training credit by the IAI Crime Scene Certification Board, the Latent Print Certification Board, and the Tenprint Fingerprint Certification Board and 8 hours of certification/recertification training credit by the IAI Forensic Photography board.

Jennifer Peterson, CLPE, CSCSA

Holding a Bachelors of Science degree at the University of Utah and completed her Forensic Death Investigation Graduate Certificate at the University of Florida, Jennifer Peterson is a member of the International Association for Identification (IAI) and the International Association of Bloodstain Pattern Analysts (IABPA).

She has been deployed to Afghanistan as an instructor at the Afghan Criminal Techniques Academy where she taught courses in latent print processing and latent print examinations and to Iraq as Deputy Director of the Combined Explosives Exploitation Cell-Biometrics Laboratory, specializing in the forensic analysis and exploitation of IED evidence.

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