In the US our police system is much different. For example, In VA, if you shoot a perp in your home, you generally get no charges, even if the perp dies, because of castle law which dictates anyone uninvited to your home and endangering life/property can be shot.
Good thing you live in VA. The last time I tried to complain about someone threatening me, the local police threatened me with a disorderly conduct charge.
Maybe I should have just invited him in, shot him, and put a knife in his cold, dead hand (Castle Law).