INTRODUCTION.

Every object, natural or manmade, has an individuality, which is not duplicated in any other object .It is unique. Neither the nature has duplicated itself, nor man can. This is the law of individuality, which is of fundamental importance in forensic science. Anything and everything involved in a crime has individuality. The culprit is unique, his modus operandi is unique, his weapon of offence is unique, scene of crime is unique, evidentiary clues, left over or picked up by the culprit, are unique. The main task of the investigator is to identify the uniqueness to link the crime with the criminal. It was a tedious task till the advent of the DNA Profiling technique .The advancement in biotechnology has gifted the forensic scientist with the most powerful genetic marker, the DNA, for individualizing and discriminating the biological evidence in forensic investigations. The term DNA Fingerprint was a trade mark name given by Cell mark Diagnostics, a company in America which licensed the technique, developed in U.K.Later this term was evolved to be replaced by the term DNA Profiling.DNA profiling is an absolute method for identification as on today for individualization of biological sample to the probability value of 99.9998 percent. The theory of the technique lies of the fact that each individual inherits DNA from its parents in the proportion of 50:50 DNA in one person does not match with other person in the world.

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