Massachusetts has a very weak "castle doctrine" law. It provides for a defense that can be hard to prove. It may provide little protection for the homeowner in this case. Three young males, at least two of which had been drinking, approach a dwelling and pound on the door. The door is locked. The resident "tried to communicate". At least one continues to pound on the door. The resident calls 911 to report an attempted break in. Someone (presumably the person pounding on the door) breaks out some glass. The resident, fearing a home invasion, fires through the door,...