'Emily Will, a documents expert approached by CBS to examine the memos, told NEWSWEEK that she was told by a CBS News producer that the network's source had received the memos anonymously through the mail. Intense scru-tiny has centered on the role of William Burkett, a former National Guard official who charged last February that he saw Bush Guard documents in a trash can in 1997—an allegation that Guard officials strongly denied. A source who worked with CBS on the story said Burkett was identified by a producer as a conduit for the documents. Three days before the broadcast, Burkett e-mailed a friend that there was "a real heavy situation regarding Bush's records" about to break. "He was having a lot of fun with this," said the friend, Dennis Adams. Burkett told a visitor that after the story ran, Rather phoned him and expressed his and the network's "full support." CBS has declined to comment on the sourcing of the network's story. Burkett's lawyer told the press his client would never "condone forgery," but did not respond to detailed questions posed by NEWSWEEK. Burkett himself refused to talk to reporters camped outside his house last week, although he did tell a journalist that since he began speaking out, unnamed assailants had killed his dog and threatened to rape his wife.'
from Newsweek