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Yes, first and foremost, this is Pete's merit; he clearly lacked the courage to declare Alex a cheater (because then Cobra would also have to be declared a cheater as an accomplice), but it was possible to remove someone from the competition who had a 5 out of 5 record in the main tournament.
The investigation into Alex's case on the "independent resource" was amusing, where all members of the AC were actually moderators. It's unclear what point of view could be considered there other than the biased one described by Dubrovin and Pete.
I fully support Forrest on this issue. I wish the AC continued success in their work.