Detroit is a black mark upon the nation and a national shame. It should be revitalized or turned, in it's absolute entirety, into a refuge or a mini prison state or something really neat.
DCal430's wisdom on gun laws
If the children or other family members will have access to the gun then they should be interrogated too.
We can also use teachers to enforce these rules, they can ask their students to be honest and if mommy and daddy are in violation of these rules.