February 28, 2011 1:45pm MEXICO CITY — Presunto Culpable, a gripping film that puts Mexico’s archaic judicial system on trial, has become the nation’s highest-grossing documentary ever.

The documentary, directed by investigative journalist Andrew Glazer and produced by J. Weston Phippin, sheds light on the alarming crisis of disappearances in Mexico, where over 115,000 people ...