""I would create a national database of owners, serial numbers of ALL guns and all those who use weapons in crimes... and perhaps more. This might be the easiest idea to pursue. Perhaps some of it already exists.""

Good idea Bill, and I would add to that compulsory test firing of every weapon sold, with cartridge and slug added to the database.

I imagine the cops would be overjoyed if they had an automatic means to find murderers by forensic checks on a slug.

Don T.