Ignoring the lawsuit aspect, this is interesting. They theory is that the Tesla was on auto pilot following a slow car. The slow car changed lanes and the Tesla accelerated into the back of a stopped fire truck. Oops.
Also interesting... Tesla has all the data about what happened - when your hands were on the wheel, when you brakes, etc.
https://apnews.com/3f1ac72f186d45cdbfac7dbb04907b11