Pillai questioned the motive behind the US entering into the plea bargain with Pakistani-American Headley, who did a recce of the 26/11 targets for the Lashkar-e-Tayiba, which carried out the attack three years ago.
"I think the very fact that a person who is so closely involved in 26/11 attacks, once arrested, the Americans went into a plea bargain without informing us. One of the conditions was he would not be extradited to India. So we would like to suspect the motive behind the plea bargain itself," he told the media in New Delhi.
Pillai said the circumstances in which Headley traveled into India, then Pakistan and then to the United States eight or nine times, it should have raised the alarm in America.
"Besides, the (his) first wife and the second wife all said that he was involved in terror activities -- no action has taken. We have raised these issues but the Americans, I think, were in total denials of these," he said.
The retired bureaucrat said the US was yet to share with India lots of information about Headley which include information about his passport, information about his bank accounts, information about complaints, reports and explanation given by his second wife.