You've probably heard of Pat Tillman, the Arizona Cardinal football player who gave up his multi-million dollar sports contract to join the Army Rangers in 2002. After his death in Iraq, he became an instant symbol of patriotism and heroism, and stories abounded of Tillman running uphill, shooting the bad guys and shouting movie-worthy lines.

But, according to his family, the truth about Tillman's life and his death are starkly different than the story we were told.

The documentary focuses on Tillman's mother, Dannie Tillman, who simply will not stop searching for the facts about her son's death, despite being thwarted at every turn by the military and the government that Pat gave his life to support and protect. And it is this fascinating family that, to me, is the most interesting aspect of the film. They curse, they question authority, they refuse to back down, and, most of all, they want the truth...and want US to know the truth, to know the real Pat Tillman, his contradictions, his doubts, his warts and his perfections, all the shades of grey. And the family is understandably disturbed that people who did not know Pat Tillman have invented a very black and white caricature of the man and have used this created image as propaganda, as a recruiting tool and as a symbol of the war in Iraq.

After pouring over thousands of military documents, talking with Tillman's fellow soldiers, even confronting military brass in Congressional hearings, the details of Tillman's death are still murky, and the Tillman family is still dissatisfied with the falsehoods that were propagated and the people who have never been held responsible for the lies and for the death of Pat Tillman. Watching this film is absorbing and infuriating and sad and ultimately fascinating.

I thought I knew the story of Pat Tillman. I was wrong. And we may never know the full details of his death. But this film reminds us that the truth is worth fighting for, that heroes and patriots come in all shapes and sizes and that our leaders owe us the unvarnished truth.