The fact that Azazel (who was a proven inno at the time) let ducky kill him without fighting back is pretty convincing proof that they were at least telling each other that they were T/Inno.
But since there's only proof of one round, they'll both be getting a 3-day ban.
http://www.bans.randomgs.com/index.php?p=banlist&searchText=STEAM_0%3A0%3A42096458&Submit=
http://www.bans.randomgs.com/index.php?p=banlist&searchText=STEAM_0%3A0%3A22998783&Submit= (http://www.bans.randomgs.com/index.php?p=banlist&searchText=STEAM_0%3A0%3A22998783&Submit=)