One of the "science/history" channels had a show that did an analysis of the OK Corral shootout based on all the evidence they could compile.
Autopsy info, old survey/building information, eyewitness accounts, etc.
The gist of it was that the Earps were almost certainly in the right and their being absolved of murder was the correct call.
There were some surprises, the first of which was that according to building/survey records of the time the vacant lot was much narrower than it is today.
I believe that the analysis also showed that while the Earps (Doc, actually) probably fired the first shot he almost certainly did so in response to the shootee trying to pull a rifle from his saddle scabbard. This was based on the autopsy info which showed a rather odd entry angle for the buckshot load.
I don't figure that any movie is historically accurate. Heck, they can't even stick to doing a movie the way a best seller book is written, and that's all in black and white. I think they change some things around just for the fun of it.
Blackhawk Down is a prime example. The moviemaker changed several details from the book even though I could determine absolutely no impact on the overall story... i.e. they made the changes for no apparent reason.
Still, I think Blackhawk Down and Tombstone are very entertaining and would rate them pretty high on my list of good movies.
