Like snowflakes, no two persons' finger prints are exactly alike, not even those of identical twins.

A fingerprint is the pattern on the inside of the finger in the area between the tip and the first joint and stays the same from the day of a person's birth to the day they die.

These two facts make fingerprints very useful in identifying somebody beyond any doubt, and this is why police forces find them invaluable in tracking down a criminal. In more than 100 years of fingerprint record-keeping, no two identical sets have ever been found, even on identical twins. The scientific study of fingerprints, known as "dactylography", is used as a technique of crime detection by practically every modern law enforcement agency. Other government agencies and many private businesses also use fingerprints for identification purposes. The largest collection of finger prints is held by the Federal Bureau of Investigation (FBI) in America.

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