Unique Readout News Today

Be seen with the help of another machine. >> the laser would trace the dna. thats what youre going to see here. >> reporter: its a unique readout called a dna fingerprint. to solve the case that fingerprint can be added to or matched in a federal database including some 14 million different profiles. >> hair saliva urine, semen, all these can be used. >> reporter: seemingly small clues picked up at crime scenes. he says a piece of crust can yield millions of cells or even just a few. sometimes t...

Cells? >> purifying the dna. >> reporter: the sample is amplified. millions of copies made, make the sample large enough to be seen with the help of a machine. >> the laser with the trace the dna. thats what you are going to see here. >> reporter: a unique readout, dna finger print. to solve the case, that fingerprint can be added to or matched in a federal database including some 14 million different profiles. >> hair. saliva, urine. semen, all these can be used. >> reporter: seemingly small cl...