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Erin Daniel is on a fact finding mission to see if anyone would be interested in the below listed class tentatively scheduled June 24-25. This is not set in stone yet. Erin is just putting feelers out there whether this would draw some attendants. Please contact her if you would be interested.  

Alice Maceo has an opening for her 2-day distortion class June 24-25 (she does Thursday-Friday classes only). We would be willing to host the class here in Flagstaff (nice time to get out of the valley!). It would be $200 a person and I would need to fill at least 20 seats. So please pass this on to anyone in your agency that would be interested and let me know if you would like to attend. I don’t need an absolute yes, but I need to know if we could get 20 people up here so I can book Alice for that time. Let me know if you have any questions. Thank you for your time.

Erin Daniel
Office: 928-773-3651

Analysis of Distortion In Latent Prints

Course Description

All impressions of the friction ridge skin bear distortion. Each time the skin contacts a surface, a combination of factors influence the final appearance. Each touch is different and deforms the skin in its own way, creating variation in appearance among impressions of the same area of friction ridge skin. How do pressure and movement affect the appearance of the skin? What are the clues that allow a trained scientist to explain variation in appearance by reconstructing the touch? This two-day workshop focuses on the Analysis phase of the ACE-V process as it pertains to the various factors (with heavy emphasis on skin deformation) that contribute to distortion of latent prints.

The following information will be presented to the attendees:

• Basis for uniqueness and persistence of friction ridge skin
• Effect of condition of the skin on the appearance of latent prints
• Effect of the residue (matrix) on the appearance of latent prints
• Effect of the mechanics of touch on the appearance of latent prints
• Effect of the surface (substrate) on the appearance of latent prints
• Effect of the development technique on the appearance of latent prints
• Analysis of deposition pressure and wobble
• Analysis of horizontal and vertical shearing stress
• Analysis of torque (rotation)
• Analysis of pressure changes during shearing stress or rotation
• Analysis of combined shearing stress and rotation
• Application of skills to “real world” latent prints

Alice Maceo holds a BS in Biology from the University of Alaska, Anchorage and has been an active latent print examiner since 1997. She is currently the Forensic Lab Manager of the Latent Print section of the Las Vegas Metropolitan Police Department Forensic Laboratory. Alice has been certified as a Latent Print Examiner by the IAI since 2001. She is also a distinguished member of the IAI and continues to serve on SWGFAST, the General Forensic TWG, the Expert Working Group on Human Factors in Latent Prints, and the IAI Editorial Board. Alice has published multiple articles and has lectured through out the U.S.A., Canada, and Europe. This workshop is the culmination of two years of research designed to aid the interpretation of forensic evidence.