Taze and Kill This is Normal?

I play cop. I tazer then shoot suspect but I die. Admin punish for taze and kill. Suspect is moderator and he tell me to  go here after explaining. My logic is Anti-damage protection expires, then time to kill.
you won't take damage as long as you are under the tazer's effect, once the effect wears off, you will start taking damage. It's allowed to do this afaik, you might have been wrongfully punished, you should make an appeal @Ban and infractions appeal.
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Thx