I am always the one going by the FBI stats, but I will say there are likely quite a few "sleepers" out there that people don't know about.

My family lived next to people like that for several years in a city that is frequently discussed on these boards and where a lot of people think they know every single "associate" etc.

I have never seen these peoples name come up, ever, anywhere, online or in the paper, and there is really no doubt that they were mobbed up--to the point where I would be very, very surprised if the father and the brother were not "made." A police officer basically told us that was the case, even.

So... you never really know.