"Two intelligence sources tell NBC News that the year before the U.S. raid that killed Osama bin Laden, a 'walk in' asset from Pakistani intelligence told the CIA where the most wanted man in the world was hiding"

NBC News.

Also:

Updated Zero Dark Thirty Script: INT. CIA OFFICE - DAY ISI AGENT: Here is where Osama bin Laden is. JESSICA CHASTAIN: Thank you. THE END

— Adrian Chen (@AdrianChen) May 11, 2015

Previously in WaPo:

She was a real-life heroine of the CIA hunt for Osama bin Laden, a headstrong young operative whose work tracking the al-Qaeda leader serves as the dramatic core of a Hollywood film set to premiere next week.

...

The operative, who remains undercover, was passed over for a promotion that many in the CIA thought would be impossible to withhold from someone who played such a key role in one of the most successful operations in agency history.


She has sparred with CIA colleagues over credit for the bin Laden mission.