I think non-fatal in injuries are significantly higher than fatal injuries. I don't have a source for that for USA at hand but it's certainly true globally by a factor of 15-40 https://www.who.int/news-room/fact-sheets/detail/road-traffi...

Also, anecdotally, I hear quite a lot about family of deceased in wrongful police shootings suing police. Although I don't think the difficulty that a private citizen has getting justice after being wronged by a police department is really at all the same as most road accident situations.