This is a movie about process. It's about what happens when a case goes cold and simple answers don't suffice. It's a risk taken when one does a fictional presentation of an historical event from fairly recent times. You can stick tot he facts or simply make things up. I enjoyed this film because the three principle characters were real and human. All were in over their heads to some extent. Jake Gyllenhaal character makes that sometimes unfortunate serendipitous discovery and becomes obsessed. The police have done what they can, but without passion and this is what Gyllenhaal's character brings to the game. Unfortunately, so much time has passed and so much has gone cold. So everything is based on circumstance. We must content ourselves with what we find and give up on confessions or witnesses. I knew from the start what the case was about and I recommend that those sourpusses that complain about this film do a little reading (maybe one paragraph on Wikipedia which should handle your attention spans) and then decide whether you want to bother with this. Personally, I thought the acting was superb and it painted a picture of the frustration with trying to solve a case with only bits and pieces.
