He was shit talking certainly but i've blamed people myself that I accidently TK'd because well.. they got in the way. So I don't think this is evidence enough that he was intentionally teamkilling you, because shit talking isn't really against the rules. I mean he probably did, but I'd at most kick the guy for it if I saw it on the server anyways, so I am just gonna go with a warning for Krask and will punish him harsher if I see him breaking rules in the future.