FAIRFAX, Va. (AP) - An FBI analyst who studied terror threats is the latest victim of the Washington-area sniper, and investigators said Tuesday they were confident that detailed witness accounts from the scene will lead them to the person who has now killed nine people.

A senior law enforcement source, speaking on condition of anonymity, said there were no indications the sniper targeted Linda Franklin because of her job.

Sources said she worked for the FBI's National Infrastructure Protection Center which assesses threats against major structures and cyber networks.