DNA Database

Here is a very simple proposal.

From every baby born a tiny sample of DNA is taken that goes into a country wide database, with sharing agreements between countries. When a crime is committed it will make is easier to track down criminals.

Let's examine who could have any reason to object to this:

Criminals - D'uh of course they would not like such a system, they are after all criminals.
Spies - OK I can kind of see a point here, their names can be temporary removed from the larger database.
Privacy Advocates: see criminals above. Regular people should have nothing to fear from having their DNA on file what possible use could it be put to to give problems to regular, honest people.

If the data is misused, e.g. stolen and sold etc. all parties in the chain should receive automatic life sentences (real ones, e.g. not the Australian pretend versions).