At the individual level, someone doing their own interpretation of Charles Bronson in the old movie "Death Wish". (just the first one) Where someone who is tired of waiting for the police to "do something" since they are constrained by technicalities like probable cause.
This is completely separate from justifiable self defense. And it is just what it is. Either Laci or Dog Gone like to use the term extra-judicial execution when discussing someone shooting someone breaking into their home. Though in this case, it would be a proper term to use.There is actually what I feel is a pretty good example of this moving through the court system right now up my way. After being arrested and I'm assuming mirandized, he kept talking and has likely sealed his own fate. This actually took place a half hour drive from my home.