Von Smallhausen said:Ok then.
Lets say that you are mistaken for someone else who is on the fingerprint database and that person is wanted on PNC for, say, drugs offences and you are arrested. The person who is wanted and is on the fingerprint database will also be on the DNA database so a sample from you will not match that of his. The odds of having identical DNA are almost impossible.
The situation I give though is highly unlikely to happen.
Still, the burden of justification is on the police to justify exactly why they need these powers, not vice versa
