She (correctly) beat an evidence tampering charge on reasonable doubt, because the person Reed handed a white baggie of powder to, threw it away - after the shooting happened.

If she’s actively using narcotics (why else have it on her?) and working as a set armorer, that is a massive dereliction of duty irrespective of drug laws. She needs treatment absolutely, but as set armorer it is your responsibility ultimately, and there was live ammo that fired on set that day. That is her responsibility, Baldwin’s culpability for firing/“pointing” the gun remains to be determined.