It is actually a huge misconception a lot of people seem to have. Shows like CSI and Law & Order do not help. They seem to be legit but they are often off on the actual science and the facts of what is allowed to be done.
Now some countries like Germany actually require that a couple of rounds must be received by the police (if I am remembering correctly) before the gun is actually allowed to be sold/imported into the country.
Now some countries like Germany actually require that a couple of rounds must be received by the police (if I am remembering correctly) before the gun is actually allowed to be sold/imported into the country.