...Without reasonable fear of great bodily harm or death.There's a lot to unpack here...but, the TLDR facts are that in Louisiana you cannot shoot someone for breaking into an empty car, shed, four-wheeler, or whatever that you have sitting on your property outside of your house.
If someone's breaking into a car that I know has a gun in it I'm probably going to stop them by any means necessary, so they cant hurt me or anyone with it.
I'm speculating here, but I wouldn't be surprised if a USSS vehicle had at least a couple of guns in it.