To be fair, the tribunal has been an inconsistent mess for years, designed to give the AFL the outcomes they want at their discretion.
Remember when Hall was cleared to play after KO'ing Staker, or when NN was banned for not calculating the force x weight differential prior to tackling?
He got suspended for 2 months from memory.
I believe your talking about the gut punch to mcguire, behind the play. Getting of that allowed him to play in the 05 GF.