An attack late at night in a seemingly peaceful suburb . . . a home-owner who deploys an AR-15 rifle to deadly effect, shooting fast and accurately . . . I wonder what the backstory was? I can't imagine those drive-by shooters chose the house at random, and I certainly can't imagine that the home-owner was standing by ready for combat with a fully loaded AR-15, just in case!
Was this a case of mistaken identity? A drug deal gone bad? A feud between gangs, or between gang members? If you can provide more information, please do so in Comments.