There have been a few recent threads about folks wanting beta on commercials, esp those to NOT work with. You might search for those and get better information overall than just accident/death reports.
If you want proof of no violations (of any sort), you could ask for info on their insurance carrier, and contact them (maybe?). But just because some wahoo wanted to sue a company doesn't mean they did anything wrong or are not upstanding. Conversely, just because an insurance carrier pays/settles a claim, doesn't mean that too. (it often just means they think that's cheaper than the legal costs)
I am a river, babe - I've got plenty of time, I don't know where I'm going, I'm just following the lines..... - "We are water" by Shaye