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Forensic scientists can use DNA in blood, semen, skin, saliva or hair found at a crime scene to identify a matching DNA of an individual, such as a perpetrator. This process is formally termed DNA profiling, but may also be called "genetic fingerprinting

".

In DNA profiling, the lengths of variable sections of repetitive DNA, such as short tandem repeats

and minisatellites, are compared between people. This method is usually an extremely reliable technique for identifying a matching DNA.

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