YIKES! That's a scary, scary situation that I hope to never be in. Thankfully no one was seriously injured.
The thing that really gets my goat, though, is this: "Police haven't decided whether they'll try to charge Khang with a crime."
They bust into the wrong house on a no-knock (don't get me started) and they're actually considering charging the man who defended his home and family? How retarded is that? I don't care if you're yelling "Police!", flashing badges, or have those nifty vests that proclaim POLICE in yellow across the front, you pull something like that in an honest man's home, this is the least you should expect.