When there's a crash, all information related to the crash should be public information: all raw telemetry information collect by the car, and the logic used to evaluate that telemetry. The idea any portion of this is proprietary is dangerous. If a police officer asks a human driver questions, and they refuse to answer, they can be compelled. If they are asked if they can think of anything else relevant that hasn't been explicitly asked about the accident, and they say no, and it turns out they did and were withholding information, that's a crime.

There must be equivalents for autonomous driving. They can't be allowed to shield themselves behind "proprietary information" claims.