personally i thought it was pretty obvious from blake's pressers, he seemed he was about to cry waffling on about how he spent hours talking to him, went from (paraphrasing) "his job is safe" at the end of january to sacked at the beginning of february
i think he opened his fat mouth saying that todd's job was safe and AEG gave him the ole peepee slap and let him know that HIS job isn't safe so saving his own ass becomes the priority
silence at the tdl, etc, i think there's more than just one smoking gun