It took me two years to find a bootleg copy of it, thanks to Bill Browders efforts to bury that film.
(Before anyone asks, yes I am a Putin-bot working in a Moscow farm. Now go watch the f%%ing movie)
It seems that distribution and screening support for the film crumbled under threats of libel lawsuits. The Washington Post dismissed it as 'propaganda' in an editorial, although the curious thing is their editorial significantly misrepresents the content of the film.
It could be, of course, that this film-maker is really in Putin's pocket. Or that he just wanted to get attention and didn't care about the truth. But it does seem that points raised in the documentary have been dismissed rather than addressed, and Browder's overall conduct strikes me as suspicious.
[0] https://consortiumnews.com/2017/10/28/guardians-of-the-magni...
Movie by the 'top anti-Putin Russian director' is called "The Magnitsky Act. Behind the Scenes", not "The Magnitsky Files".
The support for claims "effort to bury that film" or "top anti-Putin director" is on you though.
And movie “The Magnitsky Files: Organized Crime Inside the Russian Government.” is a different movie and was presented by Browder itself: [0] (looks like it's a story from WaPo but I cannot open WaPo link, so here's the copy) [0} http://russian-untouchables.com/eng/2012/06/magnitsky-docume...
I said as much.