since every one has there own unique DNA, the police can then get samples of it and match that DNA with a record of all other Dana's and see if it matches with one . So they are technically match making.
It can be used to identify the criminals easily if the criminal's hair sample or blood sample is collected and comparing it with the DNA of the suspects
DNA is something like hair or finger prints, it makes it easier to find the suspect because only one person in the world can have a specific pattern on their finger. Even twins have different ones....
Each person has their own DNA profile, unless they are identical twins, in which case they would have the same profile, but unique fingerprints. Forensic scientists can use the DNA profile of a...