FRONTLINE and ProPublica investigate the mysterious circumstances behind David Headley's rise from heroin dealer and U.S. government informant to plotter of the 2008 attack on Mumbai.

David Coleman Headley's long-awaited testimony at the start of a trial with international repercussions resolved one question at the outset: Federal prosecutors did not hesitate to connect ...

Watch FRONTLINE and ProPublica's documentary on American-born terrorist David Coleman Headley, who helped plan the deadly 2008 siege on Mumbai.

Officials say David Coleman Headley slipped through the cracks despite repeated warnings to U.S. law enforcement. Indian authorities think the U.S. knew more than it has revealed about the ex ...

David Coleman Headley's testimony revealed Rana's active role in supporting LeT, providing cover through his business and facilitating reconnaissance.

U.S. citizen allegedly co-planned attack that killed 175, including 6 Americans. Dec. 7, 2009 — -- The U.S. Attorney's office in Chicago has filed terrorism charges against a Chicago man for ...

The sentencing of David Headley to 35 years in prison has angered many in India. Will it damage growing U.S.- India cooperation in other areas?

The sentencing of David Headley to 35 years in prison has angered many in India. Will it damage growing U.S.- India cooperation in other areas?

CHICAGO — The life of David Coleman Headley, a self-confessed American terrorist and Pakistani spy, has moved from soap opera to crime story to espionage thriller. Monday begins the most ...

Rana, a Pakistani-born Canadian, allegedly assisted David Headley in reconnaissance and planning. His extradition could provide fresh leads into the conspiracy and Pakistan's role in the attacks.

David Headley, the Pakistani-American man who helped plan the November 2008 terrorist attacks in Mumbai, India, has expressed remorse for his involvement in those attacks for the first time publicly.