what do the police do if the firarm is stollen or turns out sold without authority?
If it's something cool and a pig likes it, then they keep it. If a pig thinks it would make a good "ham sandwich" to throw down someday, again they keep it. All others get destroyed.
Stolen? too bad - we're THE LAW! (So you're just SOL.) Nothing will ever come of it.
They will turn them over to Obama, for use by the Mexican Drug Cartels.