This should be an easy one. First Tupac Shikur Was indicted for shooting two undercover police officers some years back and he was acquitted of any wrong doing because they did not identify themselves as police officers and came at him with their guns drawn. This Gentleman did not see any weapons and the article didn’t mention whether they had made the announcement "Police open up". It will become a firearm charge in the later stages unless he had a license for a firearm. Some states require that an individual be inside your home. Crossing the door way threshold is the break point in which you can use deadly force to protect yourself. A good lawyer could get him off!