After deactivation of alert, the light and siren goes off and Warden ICs in slaved nodes stop in their tracks.
After deactivating principal IC, deactivation of the drones to stop shooting went smoothly, and you could proceed to close in meat.
Before you did you scoped the internals of the car with internal camera that were linked to the peripherals on the desk construct.
Inside you have seen a body of an orc in a utility jumpsuit. It is long dead, dried off beyond recognition. It is laying nearby the postument with manual control over the drones. Going by the logs, you've discovered that the poor fellow was updating scripts of the defense mechanism to increase the range of active defense to 100 meters. He also removed RFID identification and arm safety to have a drone operate more inteligently. As soon as he did, the drones made a short work of him and a principal IC took over... why nobody ever come later to this car or why the car at all is standing here is anybody's guess as any information about car's ownership, travel and previous history as well as camera feeds are deleted.
Reaching in meat you found out that the car was standing on a repair sidetrack there is an utility to lift the car up for maintenance and repairs. The car isn't lifted, but its hooked to it and powered on from the active electrical grid. There is a room in the tunnel to the side of the car, that was probably place to store tools, parts and the like but it is empty. The car inside is a prison car it has 8 rooms that contain bed & toilet, no windows, and maglocks on the doors. All of the rooms are empty.
The autoreloading mechanism contain two more of 100 ammunition bins.