I’m rephrasing it that way to show that, depending on details this might be close to what Apple intended to do w.r.t. child pornography, something ‘the internet’ wasn’t a fan of, to say it mildly.
There’s a difference here in that there’s an ‘investigation’, but you’re also talking of ‘car crashes and accidents’, so this could get reasonably close (we already have cars that call 911 crash; should they also report it when they hear car accident-like sounds that co-occur with unexpected car movements?). Who’s going to decide whether an accident is serious enough to warrant this? Should car owners have the right to disable this kind of recording?