I think the three dot tattoo is going to be a symbol for Tiger Tiger. I imagine in the upcoming episode several suspects will have this tattoo, confusing Jane. Red John will be among the suspects, but won't have the tattoo. I don't think it was Red John that killed the latest victim, but Tiger Tiger. Tiger Tiger is who wanted the CBI bugged to see what Jane knows. I don't see why Haffner or Stiles would have bugged the CBI in a careless manner...so I don't think they are Tiger Tiger, perhaps one is red John.
