his in-game name was "Kill the Host" (not sure of his actual bnet name)
replay in question: https://www.mediafire.com/?tgmfgwx84bmll7p
this took place in the NA server.
not really sure what happened. Kill the Host warned another player and everyone in the game thought it was a new role or something, and then after he kicked the warned player, one of my party members started freaking out over the possibility of a hacker and left, so i just followed him out.
two ppl from SC2 Mafia chat (Sesshomaru and Illuminator) tried to look for anyone who might've done it through my match history but didn't find anyone