US: Man allegedly mails threats to Pelosi, celebs

A man was arrested and accused of mailing threatening letters laced with white powder to Congresswoman Nancy Pelosi, TV talk show host David Letterman and other high-profile figures, the FBI announced. FBI agents took Chad Conrad Castagana, 39, into custody Saturday on charges of conveying false information and sending threats via the U.S. mail, the bureau said in a statement Sunday. Castagana, of Los Angeles, was being held in a federal detention center pending an initial court appearance Monday, when prosecutors were expected to file charges. Castagana could not be reached for comment; there was no phone listing for him and it was unclear whether he had retained a lawyer.