""The police asked the spouse and other family members questions about the purchases and filled in a survey! "Did you know your husband was going to a gun show today?" "Did you know your husband was going to buy a gun today?" and many other such questions. If no one was home at the gun purchaser's house, the police went to the neighbors! "Did you know that your neighbor was buying a gun today? How do you feel about him doing so?" That sounds like ...Canada! Except in Canada, they phone. They do that when someone applies for a FAC (firearm acquisition certificate). They call your wife, your neighbors.