Sources involved in the investigation said that the woman had traveled to India alone from Pakistan in 2007 and had stayed in Mumbai Taj hotel, which has been one of the targets of Mumbai terror attacks.
It has been the woman could have taken photographs of targets of the 26/11 Mumbai terror attacks.
She revisited India again in 2008 with Headley.
Suspecting her to be an LeT operative, investigators say that she may have brought vital documents for Headley.
Investigators claim that the burqa-clad woman seen in the photograph of the Chhatrapati Shivaji Terminus in Mumbai was the Headley's Moroccan wife.
The two got married in 1985 but separated two years later.