Ok, since they're gone, here's what you do. Get your crazy vietnam wannabe neighbor and your loopy weirdass neighbor togethor, send your wife and kids away for the the weekend.
Then you need to break into the guys house and look for incriminating evidence, like skulls in his furnace in the basement.
Ignore the nieghbor kid if he watches, he's just watching from his porch for a good time.
The old man down the street is simply away for awhile, so dont worry about him either.
AND FOR GOD SAKES DON'T BLOW THE DAMN HOUSE UP!