Did the filmmakers behind "Zero Dark Thirty" get "inappropriate" access to top secret material as they researched the controversial new movie? That's what government officials are trying to determine in a new investigation.

The drama details the hunt for Osama bin Laden and stars Jessica Chastain as the intelligence expert who dedicated a decade of her life to tracking down the world's most wanted terrorist.

According to Reuters, director Kathryn Bigelow and writer Mark Boal have been fighting claims they used top secret material to make the film. The Senate Intelligence Committee's chairwoman Dianne Feinstein has created a panel to review all conversations between the Bigelow and Boal and the CIA to determine if spy agency chiefs inappropriately shared classified material with the pair or are responsible for implying torture techniques helped lead to the death of bin Laden.

Bigelow and Boal, who are not expected to be questioned by the panel members, have denied they had access to material they shouldn't have and recently defended the torture scenes that feature in the film.
The director commented, "We depicted a variety of controversial practices and intelligence methods that were used in the name of finding bin Laden. The film shows that no single method was necessarily responsible for solving the manhunt, nor can any single scene taken in isolation fairly capture the totality of efforts the film dramatizes."