He for sure had something "doubful" about. He said at one point : "Hey if you wanna see something cool come spec me" to which I replied that it was certainly not him thawing his teamates because he was not having much thaws but a bunch of kills and maybe 3 deaths at that time. I'm not sure if he was glitching or wallhacking, though something was wrong... but I have no proof.
In the map after we also had a "weird" player named i-bambi and I was wondering if it was the same guy. Belted went in spec to Watch him because we were wondering if he was using a wallhack. Again though, no proof... and maybe it wasn't the same person though when i-bambi left Grinch411 came back in the game... but I left.
*** As Hefe said above : A player, Austin, said that he knew for a fact that they were not the same guy... but... I'm still having a doubt.