Let's say your son had a problem with someone you know about it. Your in your house and the ups guy has a package for you. You open the door to get the package. But the guy is not from ups he is the guy that had a problem with your son. So he shoots you with an illegal gun. Then goes through your house and kills your daughter. Your son is the guy he is looking for but he is not home.

So he leaves then he thinks fuck your son. I killed his whole family that is good enough.