TOPIC: You should make the rule 2.3 clearer.

I got warned for killing a person for refusing to enter the traitor tester after three warnings I said in voice chat as a detective.The rule only states that:
"As a detective you may issue a warning to players to not do/use something, but you must still use valid KOS reasons, and not make up your own false reasons. As with rule 2.2, you need to give at least two warnings in chat before you can KOS them. "

Could that be clarified as text chat, if you're not allowed to give the warnings in voice chat?

It does say "As with rule 2.2", so the common sense would be to read 2.2 and assume that it should also be done in text chat. I know i have talked about this before and im pretty sure the rule has since been updated as last time i checked the rule regarding detective warns was 2.2a not 2.3, it makes more sense for it to be 2.2a as detective warnings are connect to ingame warnings. If it was changed back to being rule 2.2a it would solve your problem.