Metagaming is against the rules, but under no circumstance are you allowed to kill your T buddy, unless its an accident or you retaliating because they shot you first. If you were KOS'd and he gave out your location, that is against the rules as he was your T buddy. However you response to kill him made you guilty, I would've punished you every day of the week. If he continues doing this, gather some evidence and report him, because this will get you nothing.
Biosenic and weasel did nothing wrong, you didn't even report suh in game, which is one big factor that could've gotten him punished, and don't forget as Nay mentioned above. You aren't a vigilante, staff exist to enforce rules.
And one big thing, staff don't get punished in game so don't ask for a slay or a in game warning on a staff member in the future.
Also, what is this? an Appeal or a Punishment Request?