It was Al Qaeda that unwittingly let Headley down. In July 2009, British intelligence sent an input to the FBI’s Chicago desk. A man named David was planning to meet two Al Qaeda men in Derby. This was part of the planning for the attack on Danish newspaper Jyllands-Posten. “The Americans, despite their formidable signals intelligence, got their breakthrough from MI5, which was tracking Zarar Shah, the tech-savvy communications chief of the LeT,” says a former IB official. Headley came to India eight times in all, the last in March 2009, after the Mumbai attack, and left India undetected. And the only time he spent behind bars before his Chicago incarceration was, interestingly, due to a complaint of marital discord filed by his wife. Hafiz Saeed helped the couple overcome their troubles but not before Headley spent a week behind bars. In fact, MI5 had been tracking Shah closely but failed to join the dots. Zarar Shah had been spending some quality time doing a Google Earth search of two luxury hotels, including the Taj and Chabad House, and “Indian American naval bases”. He set up a VoIP connection through New Jersey and Austria to camouflage the origin of phone calls from Pakistan, and when the Mumbai assault began, extensively Googled for news coverage of the attack.