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Close up of a finger showing the pattern of skin ridges that make up a persons fingerprint identity. A fingerprint is unique to an individual. The patterns are classified into four main types: loops, whorls, arches, and combinations of these. These differences are used by forensic scientists when detecting crime. When a finger touches most surfaces an impression of the fingerprint is left, this can be recorded and later matched against inked fingerprints on file.
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