How do you check the basic mechanicals of the car at that hour? So that the driver (automated or human) cannot later claim "oh there was a mechanical failure" ?

How do you check the basic mechanicals of the car at that hour? So that the driver (automated or human) cannot later claim "oh there was a mechanical failure" ? What's to stop Cruise or other bad actors to take possession of the car and then clip the brake lines to claim it was actually an OEM vanilla car mechanical fault and not their AV hardware/software? It's not that outlandish. You already have them doing a whole bunch of lies of omission and smoke screening their video evidence, enough so to trigger a wave of resignation/firings.