In her closing arguments during the trial of the 26/11 Mumbai attack co-accused Tahawwur Rana in a Chicago court, US attorney Victoria Peters said, "During the first two weeks in custody, Headley provided valuable information about terrorists who are of interest not only to the United States but to other governments as well."
She added, "(Headley) mapped out the hierarchy of LeT, told the FBI who is in charge, who does what. Zaki ur Rehman Lakhvi (suspected mastermind of the 26/11 terror attacks in Mumbai) is the leader of the military wing."
Peters also informed that Headley has given a list of 34 places that he believes are still the targets for Pakistani terrorist organisations. She said, "And don't forget that Headley's information has value beyond intelligence value."
She also argued that this is the primary reason why the United States entered into a guilty- plea agreement with Headley.