Digital mug shots, iris scan, and DNA reports are more extensively used by various governments these days to locate criminals and preventing crimes. Earlier the main method of identifying a criminal was strictly restricted to finger prints which are a main piece of forensic evidence. During the Afgan war the US expanded its biometric methods in preventing the crimes. History of biometric technology dates back to 14th century, in China. Barros, who was exploring China, found that the Chinese merchants were stamping children's palm prints and footprints on paper with ink so as to differentiate between young kids. This could be the most primitive known cases of biometrics in use and is still being used today. Fingerprints identification, is the talebearer, which the bomb makers and thieves mainly leav behind. There are millions of finger print database with many defense agencies like FBI, now they are preparing the database of facial recognition algorithms, iris match technolog...
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