The below image of two fingerprint impressions is from a PowerPoint presentation made to the Scotland Inquiry by Christophe Champod.  The image of the fingerprint impressions shows 16 "mated" ridge features with different levels of agreement that range from "excellent" with full discriminating value to "extremely poor" with no discriminating value.  The fingerprint non-match was originally found in 1912 by Alphonse Bertillon.

                   Print 1                                                                     Print 2

 

The French police officer Alphonse Bertillon is credited with finding the above fingerprint impressions.

The above fingerprint impressions (Print 1 and Print 2) share 5 common Level II ridge features in common which may be assessed to be in "excellent" agreement.  The remaining ridge features failed to comport with friction skin elasticity thresholds. 

See cropped images below displaying the 5 ridge features in "excellent" agreement marked in red.

Print 2

The discriminating values for the above 5 matching ridge features are estimated as follows:

#1 (a bifurcation not in a funnel):  26.75

#13 (a core):  209

#5 (a delta ending ridge):  10

#4 (a non-Y Delta): 570

#6 (a bifurcation not in a funnel):  26.75

NOTE:  The remaining marked mated fingerprint features may be assessed as out of tolerance of friction ridge skin elasticity thresholds and therefore bear no discriminating value (see attached conservative assessment and calculation of the Bertillon Non-Match).

The estimate for the total quantitative-qualitative discriminating value for the arrangement of these 5 matching ridge features is calculated as follows:

26.75 x 209 x 10 x 570 x 26.75 = 852,449,606

This value represents one of the highest discriminating values of an arrangement of fingerprint ridge features the author has ever seen based on values estimated by the T-Model.

Based on a fingerprint population of 410 million (the total human population of France in 1912 was roughly 41 million people), the T-Model estimates the conservative upper-bound number of look-alikes to exist as approximately 6.46 (insufficient to infer identification).  See below calculation.

 T-Model Fingerprint Calculator v. 9.0

Christophe Champod, PhD (click here) presented the Bertillon Non-Match to the Scotland Inquiry.

Alphonse Bertillon

1853 - 1914