Headley provided video of and intelligence about the locations that later were targeted during the Mumbai attacks, Shapiro said.
Headley also assisted in plotting out a portion of the nautical route that the attackers would take, and recommended the landing point that they later used to enter Mumbai without being detected.
"Headley played a supporting role to the attacks, but an essential one that unquestionably contributed to the mass murder that took place," Shapiro said.
