I had a problem once and long story short unless you know a lawyer, its a few hundred bucks an hour just to see if you got a case, plus they will take at least 60%. I am in a class action suite with a former employer. The lawyer gets 3.5 million, I get 500 bucks.
If you need to threaten talk about sending the footage to your local news channel that fights for views, facebook or youtube. When I worked customer service everything threatened to call a lawyer, we didnt care. When customers said they were going to go on facebook, youtube, etc we had new procedures to follow.
Was he driving for a commercial company? Do they have a youtube, facebook, etc? How about posting it there?