Why would a party like Tesla, with an obvious conflict of interest, be part of the investigation? They should be on the receiving end of the investigation, not

Why would a party like Tesla, with an obvious conflict of interest, be part of the investigation? They should be on the receiving end of the investigation, not part of it. It's like having Enron be part of the investigation. It really doesn't matter what spin Tesla puts on this. Their car drove into a concrete wall. They can talk about hands on the wheel or off. They can talk about how it's only called autopilot, but it really isn't. It doesn't change the fact that their software drove the vehicle into a concrete wall. Was it asleep? Perhaps it had an attention lapse? Perhaps it mistook a solid, immovable object for something else? If you have something called autopilot, the one thing it should never, ever do is drive into a solid, immovable object, that is easy to not hit.