It has become clear to me through recent Facebook searches that people being afraid to come forward isn't the only reasons we might be dealing with here. Several of these incredibly evil guys present themselves as being holy and religious. Many of them are married and/or have children. The following is complete speculation:
If the wives/girlfriends of these individuals have info that could be helpful to LE I feel that have talked themselves out of believing it could be related. They truly do not believe that their God-fearing husband could be capable of something like this. I'm betting that these guys are playing the victim. They are probably telling their wives about how they've been "wrongly accused" of crimes like this in the past (which is why charges were dismissed) and that is probably why they're being questioned again.
There are others in the community who know what happened and are very much part of the "no snitchin' culture." They may not be afraid to come forward as much as they don't want the reputation of being a snake among their friends.
I very much believe that most of these people are caught up in dealing and using drugs which is probably how they get a lot of their money. Other ways they get their money is probably from side jobs like this:
http://www.yelp.com/biz/shauns-towing-georgetown <-thanks to the sleuth who sent me this link
