The Federal Bureau of Investigation (FBI) of the US had filed an affidavit in the district court of the Northern district of Illinois on October 11, 2009, justifying its decision to arrest David Coleman Headley, originally known as Dawood Gilani till 2006. The evidence against him described in the affidavit is based on the interception of his telephone conversations and e-mail communications between October, 2008, and October 3, 2009 when he was arrested, and the information gathered from him after his arrest.
The affidavit refers to three of his ring leaders in Pakistan--Ilyas Kashmiri, formerly of the Special Services Group (SSG) of the Pakistan Army who subsequently joined the Harkat-ul-Jihad-al-Islami (HUJI), a contact of Ilyas Kashmiri, who is referred to as Individual A and an operative of the Lashkar-e-Toiba (LET), who is referred to as LET member A. While the affidavit identifies Ilyas by name and gives considerable details of his background, it refrains from identifying the other two. The reasons for this are not clear.
While the major portion of the affidavit is about the attempted use of Headley by Ilyas to carry out a terrorist strike in Denmark, there are also references to the LET's interest in using him for a terrorist strike in India. Some media reports had initially described Headley as a White convert to Islam, but the affidavit indicates that he was a Chicago resident (US citizen?) of Pakistani origin, who claimed to have studied in the military cadet school of the Punjab Government at Hasan Abdal.
He would appear to have come to the notice of the FBI in October, 2008, when he had posted an entry in a chat group of former students of the cadet school expressing his anger over the insult of the Prophet in a cartoon published by a Danish journal. Subsequent investigation brought out that Headley hade been associated with the LET at least since 2006, if not earlier, and had been trained by it. He had made visits to India, but the affidavit makes no reference to any role played by him in the Mumbai suburban train blasts of July 2006 and the terrorist attacks of 26/11. He was in Pakistan during the period between December 2008 and June 2009. During his stay, he visited the Waziristan area, met Ilyas for the first time and swore his loyalty to him.
The references to India in the affidavit have been extracted below: