There was the case from Wilbraham a year or so ago where the intruder (known to the homeowner) forcibly entered the house, and after repeatedly being told to leave, advanced up the stairs with a broken glass or bottle, and was shot by the homeowner while his wife was on the phone with the 911 dispatcher. I don't know if his firearm was temporarily seized, but the police department and DA's office quickly determined that no charges would ensue.
I can't find the press reports of the incident, and my NES Google-fu is not working well enough to find our discussion of the incident, but I believe that the homeowner was not arrested or detained, as the facts were clear.