IAI Approved Training

P3 2

This three-day workshop, taught by Alice White, is dedicated to the friction ridge skin of the palms. Each region of the palms has distinctive ridge flows, patterns, deltas, and creases that can be exploited to determine the anatomical subregion, left/right handedness, and distal orientation of partial impressions (e.g. latent prints). Additionally, deltas and patterns on the palms have distributions within the population that inform the rarity of these macroscopic features during the ACE (Analysis, Comparison, and Evaluation) process. This course summarizes original palm print data published by Alice White in the Encyclopedia of Forensic Science.

How is this course different from other palm print classes? Lecture and practical exercises are focused on each subregion of the palms. The practical exercises are designed to build and reinforce mental templates that facilitate the recognition of distal orientation and handedness of partial palm prints. Once each palm region is given dedicated attention, participants test their ability to accurately assign search parameters (distal orientation, handedness, and subregion) in a mixed-region comparison exercise. The lessons learned from the mixed-region exercise are then applied to the analysis of realistic latent palm prints. As a class, the participants discuss the choice of search parameters and any appropriate uncertainties. The course culminates with a challenging, ground-truth, latent palm print comparison exercise.

The cost for this course in the United States and Canada is $495 USD per student (the rate will be adjusted to accommodate taxes if applicable). For inquiries outside of the United States or Canada, please contact the instructor at Alice@EvolveForensics.com. Host agencies receive a 10% discount for all host agency registrations!

This course focuses on the analysis of latent prints to establish search parameters for the comparison process. Attendees will learn the following and apply their knowledge in practical exercises:


  • Embryological development of the hands with emphasis on the biological basis for shared macroscopic features (classifiable features) of the palms
  • Embryological development of the friction ridge skin with emphasis on biological basis for distinguishing microscopic features (identifiable features) of the palms
  • Pattern and delta distributions within the three sub-regions of the palms
  • Diagnostic ridge flows and crease densities within the three sub-regions of the palms
  • Expected reproducibility of the following friction ridge features on the palms: primary flexion creases, secondary creases, wrinkles, and ridges/furrows
  • Shapes of latent prints created by contact of the palms with flat surfaces
  • Establishment of search parameters (distal orientation, left/right, and sub-region) for latent palm prints using the most diagnostic information
  • Uncertainty and documentation of search parameters
  • Decision-making during the ACE-V process
  • Introduction to feet

This course also summarizes original palm print data published by Alice White in the Encyclopedia of Forensic Science Please find the article on the Evolve Forensics website:  https://evolveforensics.com/publications/

Please bring loupes and ridge counters to perform the comparison exercises. Each attendee receives two notebooks to take home (a $90.00 value).  One notebook contains the lecture content and “unknowns”, while the second notebook contains the exemplar palm prints for comparison.