I agree about communication. Maybe not perceived at first as a taunt, tho. Maybe perceived in the beginnin as a citizen cooperating with and/or offering assistance.Pure speculation and I'm sure we have discussed this before but of everything Carter said in the last press conference the one thing that really sticks with me was when he said "you want to know what we know...." my first impression of that statement and the impression I still hold today is that BG has in some way made communication with LE, similar to the Zodiac.
Something had to have set off that press conference. Why, when they just had the anniversary press conference in February would they come out in April with all this new direction business. Did LE have the press conference in order to communicate back to him. We've all discussed the various things Carter said in that press conference that appear to be directed at the killer, The Shack, his conscience, their not the way you left them and so on....
I really had the feeling that BG had made contact with LE, taunting them.
And, the switch in strategy then resulting from LE taking another look at that contact.