I would lean towards the RCM (relay Control Module).
The best thing to do in my opinion is take it to an auto parts store and have them check the electrical system. (Battery and alternator).
If you have someone near you with a Crossfire, you can try swapping it and see if the problem occurs.
You can also pull fuse #9 in the engine fuse box. That will disconnect power to the alarm siren to see if your battery drain starts.