Interesting. Where did you intercept the CAN bus? Down in the center cubby area? I assume that the power on the CAN bus is live all the time, thus the power magic pro box?
The power magic box makes me wonder how you configured the cutoff. In an ICE, the voltage jumps from 12 volts to 13.5 or 14 when the engine is running. Does the Tesla 12 volt circuit jump up when the car is powered on as well? Or are you configuring it to shut things down when the small 12 volt battery starts to show serious discharge?
I assume your camera is powered down when the car is parked, therefore you wouldn’t catch a hit and run while parked for instance.