A Whorl, a Crease, and a Contributor Who Wants the Old Classification
An examiner must assign a Henry classification to a tenprint card before filing. The recorded patterns are: right thumb whorl; right index whorl; right middle ulnar loop, ridge count 15; right ring plain arch; right little ulnar loop, count 12; left thumb ulnar loop, count 17; left index whorl; left middle ulnar loop, count 9; left ring whorl; left little ulnar loop, count 14. On the left ring finger, a broad crease crosses just below the delta, and the older impression in the file could be read as a loop; the current impression shows recurving ridges above the crease. The card is a reprint of an existing record. The contributor asks the examiner to file it under the old classification so the system does not create a duplicate record, and notes that a new booking number was already issued.
1. Compute the primary classification if the left ring finger is a whorl, and again if it is a loop. Show the pair values and explain the difference.
Read the worked answer
The primary uses pair values: thumb pair 1, index pair 2, middle pair 4, ring pair 8, little pair 16. A whorl on either finger of a pair adds that value to that hand's side, and 1 is added to each side at the end.
If the left ring is a whorl: numerator = 1 (right thumb whorl) + 2 (right index whorl) = 3; denominator = 2 (left index whorl) + 8 (left ring whorl) = 10. Adding 1 to each gives 4/11.
If the left ring is a loop: numerator remains 3; denominator is 2; adding 1 gives 4/3.
The difference is a shift of 8 points in the denominator, which moves the card to a different filing group. The classification must reflect the current patterns, not the old record.
2. How would you resolve the left ring pattern, and what would you do if it remains ambiguous?
Read the worked answer
Trace the ridges across the crease. A true delta has three ridge systems and a recurving ridge that forms a complete circuit or an obstruction; a crease can mimic a delta by interrupting a loop. Use the clearest available impression, and compare with any other cards or palm prints that show the same finger. Do not classify from the older impression merely because it is familiar if the current one is clearer.
If the pattern remains ambiguous, do not guess. Document the ambiguity, follow unit policy for a provisional classification, flag the card for technical review, and request a new exemplar if the finger can be reprinted. A classification that cannot be defended is worse than a delayed filing.
3. How should you respond to the contributor's request to file under the old classification?
Read the worked answer
Refuse. Classification is derived from the impressions, not from administrative convenience. Filing under the old classification to suppress a duplicate flag would corrupt the file and could cause a later search to miss the record.
Resolve the duplicate properly by comparing the fingerprints, linking the records, and noting the new booking number. If the pattern has genuinely changed because of scarring, record the current pattern and annotate the change; the old record remains linked by identity data and by the fingerprint comparison, not by a falsified classification.