Nowaday,police in many countries keep million of fingerprints on computer files. Whey they find a fingerprint at a crime scene, they can easily match it to fingerprints on their computer as a result, it is mush easier to identify criminal though DNA.
DAN is information carried in our bodies. DAN is responsible for the colour of our hair,the clour of our eyes and everything else about us. juat as no two people have the same fingerprints, no two people have the same DNA in sigle hair, or even a tiny drop of blood left at a crime scene science is becoming a very important part of police work.