An examiner supplements standard minutiae comparison with a detailed study of the size, shape and relative position of the sweat pores lying along the friction ridges. This supplementary technique of personal identification was described by:

• A Francis Galton
• B Edmond Locard ✓
• C Edward Henry
• D Ivan Purkinje

Explanation

Poroscopy, the study of sweat pores on friction ridges, was described by Edmond Locard, who argued that pores provide additional individualising detail beyond ridge endings and bifurcations. Galton described the ridge characteristics (minutiae) themselves, Henry devised the classification system used with Galton's work, and Purkinje gave the earliest fingerprint pattern classification. When a latent print shows few minutiae, poroscopic detail can still support identification.

Reference: Parikh's Textbook of Medical Jurisprudence and Toxicology, 7th ed.

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