[wyattearp]

Of course, why would the police be testing your doorknob, out of the hundreds of millions of doorknobs? They would have to have some reason to think that testing your doorknob would reveal something interesting.

Or, they could just walk down the street testing every doorknob, and get warrants on any house that comes up "hot". Bad procedure. Good ruling.

[dpa5923]

The doorknob swap was not the sole basis of the warrant and it is extremly unlikely any judge would sign off on a warrant based on this little "evidence". The warrant was based on a number of facts, one of which was the swab on the doorknob. Although I agree with the judge's ruling, your senerio doesn't jibe with the facts of the case.