I have a loaded one literally within arms reach of where I sit typing this.
What kind of lunatic (ie. drugs?) walks onto the business end of an AR-15? Suicide if you ask me.
Sounds like he was strung out on drugs. That area can be rough. Another one of those once middle class neighborhoods that is now not quite as nice, and much more diverse, as they say. Not ghetto, but it has its share of problems and tensions.