Neil Entwistle, the 27-year old Briton accused of shooting to death his wife Rachel and baby daughter Lillian on January 19, has been linked to classified work on special Internet surveillance software, according to source close to U.S. intelligence. Entwistle was recently extradited back to the United States from Britain to face double murder charges. Entwistle has pleaded not guilty to the charges.

Police claimed Entwistle shot his wife and daughter with a .22 semi-automatic smuggled out of his father-in-laws home.

Entwistle's firm, Embedded New Technologies (ENT), reportedly had connections to the Braintree, Massachusetts-based firm P-Tech, which was investigated subsequent to 911 by the FBI for ties to Muslim Brotherhood financiers linked to Al Qaeda. P-Tech also had software contracts for the FAA, NORAD, Pentagon, and White House during the 9-11 terrorist attacks. According to Entwistle's mother-in-law, he also told his wife that he had large amounts of money held in "offshore" accounts.

Entwistle was flown from Gatwick Airport in England to Hanscom Air Force Base in Massachusetts aboard one of the CIA Gulfstream planes previously used to fly "renditioned" Al Qaeda suspects around the world. Entwistle was accompanied by U.S. Marshals. TV footage of the aircraft studiously avoided showing the plane's tail number. After questions were raised about the use of the Gulfstream, Massachusetts authorities claimed it had merely "rented" the U.S. government's aircraft for the sole purpose of transporting Entwistle.