The house that they showed in the article didn’t look too bad - it’s apparently a rental, and they arrested the woman renting it, too. Heck, it could have been Muslims, for all I know, taking advantage of the situation to stage a little jihad. They frequently rent houses to carry out their activities, and there have been a lot of them (according to what I have read here) streaming into Ferguson to cause trouble.
Bet it was a 22 to 30 year old black.