ANALYSIS OF DISTORTION
IN LATENT PRINTS
NAPA, CA | JANUARY 10 -11, 2019
ANALYSIS OF DISTORTION
This course has been approved for 16 hours of certification/re-certification training credit
by both the IAI Latent Print Certification Board and the Tenprint Fingerprint Certification Board. |
Instructors:
Alice (Maceo) White Location: Napa County Sheriff's Office 1535 Airport Blvd Napa, CA 94558 Hours: 8:00 am - 5:00 pm Tuition: $399.00 This course is presented in partnership with the International Association for Identification. |
Analysis of Distortion in Latent Prints
This two-day workshop, Analysis of Distortion in Latent Prints, focuses on the Analysis phase of the ACE-V (Analysis, Comparison, Evaluation, Verification) process. During the Analysis of a latent print, the analyst is gathering information. The analyst is detecting the features they may use during the comparison, setting tolerances for variation in appearance, and determining the utility of the print. The ability to detect these features in the latent print and the establishment of tolerances for variation in appearance are inextricably linked to the distortion present in the latent print.
Biological Distortion
Attendees will study a number of distortions introduced by the condition of the skin itself. Examples, causal explanations (based on the embryology, anatomy, and physiology of the skin), and independent exercises are provided.
Residue Distortion
Residue distortion refers to how the following affect the appearance of the ridges and furrows in a latent print:
1) type of residue
2) placement of residue on the surface of the skin
3) transfer of residue to a surface
This section of the course focuses on the most difficult of visual distortion affects: tonally transitioning ridges. Examples of tonally transitioning ridges and the causal affects are demonstrated and discussed. Attendees are provided alternative strategies for following ridges through tonal transitions.
Surface Distortion
Textured surfaces can introduce problematic background noise or create false edge shapes and pore structure. The shape of the object and the natural handling can cause unexpected finger height distributions in simultaneous impressions. Additionally, any impression where the hand and fingers are grasping an object will have clusters of minutia in unusually close proximity when the clusters are separated by a primary flexion creases. Examples of the distortion affects of different types of surfaces will be demonstrated and discussed with attendees.
Contact Distortion
The skin is a flexible medium that distorts when it touches a surface and displaces residue when it moves across a surface. The movement of the skin on the surface causes predictable affects on the ridges and furrows that are easily recognizable. Attendees will analyze the distortion affects of latent prints placed on glass under controlled conditions. After analyzing the latent print, the attendees will observe the actual video of the latent print being deposited onto the surface. Attendees will be provided a different paradigm with which to consider distortion: how the skin leaves an impression. For many, this is a shift from trying to decipher a latent print based on what is expected in the known print.
This two-day workshop, Analysis of Distortion in Latent Prints, focuses on the Analysis phase of the ACE-V (Analysis, Comparison, Evaluation, Verification) process. During the Analysis of a latent print, the analyst is gathering information. The analyst is detecting the features they may use during the comparison, setting tolerances for variation in appearance, and determining the utility of the print. The ability to detect these features in the latent print and the establishment of tolerances for variation in appearance are inextricably linked to the distortion present in the latent print.
Biological Distortion
Attendees will study a number of distortions introduced by the condition of the skin itself. Examples, causal explanations (based on the embryology, anatomy, and physiology of the skin), and independent exercises are provided.
Residue Distortion
Residue distortion refers to how the following affect the appearance of the ridges and furrows in a latent print:
1) type of residue
2) placement of residue on the surface of the skin
3) transfer of residue to a surface
This section of the course focuses on the most difficult of visual distortion affects: tonally transitioning ridges. Examples of tonally transitioning ridges and the causal affects are demonstrated and discussed. Attendees are provided alternative strategies for following ridges through tonal transitions.
Surface Distortion
Textured surfaces can introduce problematic background noise or create false edge shapes and pore structure. The shape of the object and the natural handling can cause unexpected finger height distributions in simultaneous impressions. Additionally, any impression where the hand and fingers are grasping an object will have clusters of minutia in unusually close proximity when the clusters are separated by a primary flexion creases. Examples of the distortion affects of different types of surfaces will be demonstrated and discussed with attendees.
Contact Distortion
The skin is a flexible medium that distorts when it touches a surface and displaces residue when it moves across a surface. The movement of the skin on the surface causes predictable affects on the ridges and furrows that are easily recognizable. Attendees will analyze the distortion affects of latent prints placed on glass under controlled conditions. After analyzing the latent print, the attendees will observe the actual video of the latent print being deposited onto the surface. Attendees will be provided a different paradigm with which to consider distortion: how the skin leaves an impression. For many, this is a shift from trying to decipher a latent print based on what is expected in the known print.
LODGING
Springhill Suites by Marriott
101 Gateway Road E
Napa, CA 94558
Room Rate: $129 plus tax
Booking Info: Room reservations can be made online by going to www.springhillsuitesnapavalley.com and using the group booking code:
DCGDCGY = King Suite or DCGDCGZ = Double Suite.
Guests may also make reservations by phone with Marriott Reservations at 1-888-236-2427 or by calling the hotel directly at 707-253-1900 and mentioning Distortion Course Group Block.
The hotel room block cut-off date is Thursday, December 20th, 2018, so please make your reservations early.
Springhill Suites by Marriott
101 Gateway Road E
Napa, CA 94558
Room Rate: $129 plus tax
Booking Info: Room reservations can be made online by going to www.springhillsuitesnapavalley.com and using the group booking code:
DCGDCGY = King Suite or DCGDCGZ = Double Suite.
Guests may also make reservations by phone with Marriott Reservations at 1-888-236-2427 or by calling the hotel directly at 707-253-1900 and mentioning Distortion Course Group Block.
The hotel room block cut-off date is Thursday, December 20th, 2018, so please make your reservations early.
REGISTRATION
To register for this course, please download the Course Registration Form (PDF file). Fill out the form and email the completed PDF file to Phil Sanfilippo at phil@tritechusa.com.
To register for this course, please download the Course Registration Form (PDF file). Fill out the form and email the completed PDF file to Phil Sanfilippo at phil@tritechusa.com.