re: At fault accident question

It's all a he said she said thing anyway. Yes you're presumed to be at fault for rear end collisions but Louisiana is a comparative fault state. Which means if you can somehow prove he was the aggressor and caused the accident then you could be free from liability or at the very worst share 50/50 liability or fault with the other driver. Because technically you should have seen him coming and been prepared to stop if he didn't act accordingly.