I'm down for lynching Mojo, although I feel like I need a bit more than "Irish's hunch." Perhaps process of elimination will provide some assistance.
I agree that Retal would have pushed Orange more if he seriously copped Orange as mafia.
Irish to me is reasoning with a straight head. His thoughts mostly echo mine.
I "copped" killing you as mafia on D2, well before the Oracle snaffle. I know this doesn't clear me 100% but it certainly lends a hand.
This leaves Brigitte and Mojo as the remaining suspects.
Brigitte "copped" both Retal and Irish as town. I suspect she already knew they were town, and the most likely players for everyone else to townread.
Mojo's been shitposting all game just like me. Nothing super solid to go on with him but I think by process of elimination it's probably him and Brigitte.