American-born terror suspect David Headley had not only actively played a role in conducting reconnaissance of targets in Mumbai but was also present in a control unit in Pakistan along with the masterminds of the attacks to guide 10 Lashker-e-Taiba terrorists to carry out strikes in the megapolis.
Sources privy to the investigations of the terror suspect's trail in India said 48-year-old Headley was very much present in the room from where the 10 LeT terrorists were being guided to various locations during the 26/11 attacks.
The investigators re-visited the intercepts and found that there were specific instructions being given to terrorists about entry and exit including that they had taken more time before reaching their final targets which included Taj Mahal hotel, Oberoi and Trident towers and Nariman House.
India has asked for a voice sample of Headley from the FBI to match with a voice which was unidentified so far for the security agencies. This voice was giving information on exact surroundings of the targets attacked by Lashker-e-Taiba militants.
However, there was no firm response from the FBI on providing the same to the Indian investigators, the sources said.