'Federal investigators probing the deadly 2001 anthrax attacks recovered samples of human hair from a mailbox in Princeton, N.J., but the strands did not match the lead suspect in the case, according to sources briefed on the probe.
FBI agents and U.S. Postal Service inspectors analyzed the data in an effort to place Fort Detrick, Md., scientist Bruce E. Ivins at the mailbox from which bacteria-laden letters were sent to Senate offices and media organizations, the sources said.'
