QUESTION:
I always believed that Ardiles was BA.Firstly, he was sneaky in so many different levels, he had done something wrong that he tried to conceal,(remember when Lisbon tried to get help from him and Brenda Shetrick told her to bring up an old case), PJ's exact words when Lisbon said Ardiles to be on Jane's list: "Interesting guess, but no."

So, how comes Ardiles isn't BA?

Maybe Blake Association is a "mask", a tool for the big heads to cover up their crimes.Maybe Blake Association isn't linked to the 3-dot-tattoo.I don't know...