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Articles from The Science Of Fingerprints

The Tented Arch

Classification Of Bandaged Or Imprinted Fingers

Drying The Fingers

Water-soaked Fingers

X-ray Photography

Desiccation And Charring

Advanced Decomposition

The Loop

General Photography

Wanted Notices


Classification Of Scarred Patterns





Emphasis should be placed upon the necessity for fully referencing all
scarred patterns. In connection with their proper classification, the
following rules should be observed:

- When an impression is so scarred that neither the general
type of pattern nor the ridge tracing or count can be
determined with reasonable accuracy, the impression should
be given both the general type value and the
subclassification value of the corresponding finger of the
other hand.

- When an impression is partially scarred, i.e., large scars
about the core so that the general type cannot be
determined with reasonable accuracy, but the ridges allow
reasonably accurate subclassifications by ridge tracings or
counting, the impression should be given the primary value
of the pattern of the corresponding finger and the
subclassification value as indicated by the ridges of
partially scarred impressions.

- When an impression is partially scarred and the general
type of pattern can be determined with reasonable accuracy,
but the ridges cannot be traced or counted so as to fall
within the proper subsecondary classification, the
impression should be given the ridge count or tracing value
of the corresponding finger of the other hand, if the
corresponding finger is of the same general type. If the
corresponding finger is not of the same general type, the
scarred impression should be given the probable value and
referenced to all other possibilities.

- When an impression is so scarred that neither the general
type of pattern nor the ridge tracing or count can be
determined with reasonable accuracy, and it so happens that
the corresponding finger of the other hand is similarly
scarred, both patterns are given the arbitrary value of
whorls with meeting tracings.

In figure 355, the pattern is entirely obliterated. It could have been
a small whorl, a small ulnar or radial loop, an arch, or a tented
arch. If the opposite finger were an arch or tented arch or whorl,
this impression would be classified as arch, tented arch, or whorl
(with the same tracing). If the opposite finger were a small-count
loop, this would be classified as a loop of the same count. If the
opposite finger were a large-count loop, this impression would be
given the count of the opposite finger even though it could never have
had that count. If the opposite finger were scarred in the same
fashion or were amputated or missing, both impressions would be
classified as whorls with meeting tracings.

In figure 356, the general type of the pattern could have been loop
(ulnar if in the right hand) or whorl. If the opposite finger were a
whorl this would be classified as a whorl, and with the same tracing.
If a radial loop were opposite, this would be classified as an ulnar
loop (if in the right hand). The ridge count can be obtained with a
fair degree of accuracy. If an arch or tented arch were opposite, this
impression would be classified as a loop because it looks as if it had
been a loop.







In figure 357, the ridge count cannot be determined accurately but it
would be classified as a loop, no matter what the opposite finger
might be. If the opposite finger were a loop with a count of from 6 to
17, this impression would be given that count. If the count of the
opposite loop were less or more than 6 to 17, the count for this
finger would be given I or O in the subsecondary classification
depending upon whether the opposite finger was I or O, but would not
be given less than 6 nor more than 17 counts as its possibility is
limited to those counts.

A pattern with a scar similar to either scar in figures 358 and 359
would always be given a loop as it could be seen readily that there
was no possibility of its having been any other type of pattern.







Next: Classification Of Amputations And Fingers Missing At Birth

Previous: Extensions



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