What "evidence"? You're going off of "if it happened [my] way, it would have come out." The Bills are notoriously tight-lipped. We still don't definitively know who called the plays during 13 seconds or who was responsible for the touch back prior to it. And again the only people who needed to know were Frazier, McD, Beane and Terry, and none of them would be talking. So I'll go with my evidence of McD taking over play-calling and not hiring a new DC when there was plenty of time to do so.