Juan Vucetich

Argentine police official

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July 15, 2026

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Juan Vucetich was an Argentine police officer and pioneer in the field of fingerprinting. He developed one of the first workable systems for classifying fingerprints, which is still used in many Spanish-speaking countries.12

Fingerprints are unique impressions made by the ridges on the ends of fingers and thumbs. This uniqueness does not change with age, making them an infallible method for personal identification. The practice of using fingerprints for identification is called dactyloscopy and is a crucial tool for law enforcement. Vucetich's system, published in 1904, was inspired by the work of Sir Francis Galton, who had previously suggested a classification system based on fingerprint patterns like arches, loops, and whorls.1

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Juan Vucetich, an employee of the police of the province of Buenos Aires in 1888, devised an original system of fingerprint classification published in book form under the title Dactiloscopía comparada (1904; “Comparative Fingerprinting”). His system is still used in most Spanish-speaking countries.
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Juan Vucetich, an employee of the police of the province of Buenos Aires in 1888, devised an original system of fingerprint classification published in book form under the title Dactiloscopía comparada (1904; “Comparative Fingerprinting”). His system is still used in most Spanish-speaking countries.
Read More