And in conclusion, while it may increase the conviction rates, it sure won't reduce the crime rate. It will however increase the prison population by a chunk.
However crime is committed mainly because of need greed, or lack of heed, and is not amenable to reason. There will always be people who think they won't get caught, whether they are right or wrong in that assumption, it doesn't stop them committing the crime, and it never will.
Of course one of the fastest growing offences nowadays is cyber crime, where they going to take DNA samples from at an IP address?
Giok.