John Eleuth re du Pont was a multimillionaire. Part of one of the most prominent and richest families in America: The du Pont Family. Then, strangely, he started losing his mind. This is what is known: du Pont was a fan of amateur sports and established a wrestling facility at his Foxcatcher Farm. He befriended several Olympic champions--including Dave Schultz, who he murdered. It was a never a question of if he did it; the question is why. What turns...