(MCT) — CHICAGO — When David Coleman Headley was arrested three years ago at O’Hare International Airport, he was headed overseas to help plan a deadly assault on a Danish newspaper less than a year after he played a similar role in the horrific terrorist attack that killed more than 160 people in Mumbai, India’s largest city.

On the same day he was detained, Headley did not hesitate to start talking to U.S. officials, providing information about Lashkar-e-Taiba, the Pakistani-based terror organization behind the Mumbai attacks, and much more.