The important point to remember is that the supporters of this database don't care whether it ever solves a crime. If the database allowed police to detain, question, and issue warrants against the original owner of every gun ever used in a crime scene, it would make gun ownership more of a hassle. If a gun was stolen from someone and used in a crime, the police could harass the original owner. If someone sold a gun to a friend who sold it to another friend who sold it to someone else and so on until it was bought or stolen and used in a crime, the police could harass the original owner. The effect of this harassment and potential harassment would be to discourage people from owning guns or to discourage them from ever selling the guns that they have. If they can't sell, they are less likely to buy, and the effect is less gun ownership.
Those who would push this scheme are our enemies, and we must fight them at every turn.
WFTR
Bill