MONTREAL - There are two basic crime scenes when it comes to gun violence in Canada. One involves weapons that are traceable - sometimes using the $1 billion long-gun registry that is likely to be scrapped by the Conservative government this fall, as promised. The other - far more common - involves guns that are not traceable because they are not registered, the registration number was erased or the guns used to kill are never found. The looming question as MPs get set... (GunPolicy.org)