Headley was among four men named in a 12-count indictment returned by a Chicago grand jury in January for involvement in two plots: the 2008 Mumbai attack, and a separate plot to murder an editor and an illustrator at a Danish newspaper.
Headley’s plea agreement reveals new details about the alleged plot. It says a Pakistan-based militant leader with ties to Al-Qaeda suggested that Europe-based operatives could provide manpower for a suicide attack on the newspaper offices.
The leader said once inside the building the attackers should behead newspaper employees and throw their severed heads out the building “to heighten the response from Danish authorities.”
According to information in the 33-page indictment, Headley agreed to provide surveillance for the Pakistan-based militant group Lashkar-e-Tayyiba (Army of the Good). The group has long battled India over claims to the disputed territories of Jammu and Kashmir.