DES MOINES, Iowa (AP) — Bennett Miller, an Oscar-nominated director perhaps best known for the movie "Moneyball," didn't know much about wrestling when he started work on his upcoming film "Foxcatcher."

The experience quickly turned him into a supporter of a sport now fighting for its Olympic existence.

"Foxcatcher" tells the story of John du Pont, the chemical fortune heir who killed Olympic gold medal-winning wrestler Dave Schultz at his estate near Philadelphia in 1996. Schultz had come to live and train at the state-of-the-art Foxcatcher National Training Center that du Pont had built on his property.

The movie stars Steve Carell as du Pont and Mark Ruffalo as Dave Schultz and is set to be released later this year.