Strategy: Sour Grape; How to protect your household from a family member with a gun

[Pietro Beretta]

How do you protect your household when the person, who you trust the most, is the one with the gun?

Is there any training, tactic or strategy that could help prevent the shooter from shooting additional family members stretched across multiple households?

 

[Kleanbore]

There are far too many potential variables not mentioned in the OP to enable any constructive discussion of such a hypothetical question.