On CNN, Jeff Greenfield is also pointing at Burkett by name on this.
Burkett has confessed to being the source and deliberately misleading CBS.
It won't work---CBS had a chance to authenticate. This Burkett statement will not get them off the hook.
Also remaining to be seen---Burkett spoke with Cleland who referred him to the Kerry campaign. Did the Kerry campaign ever seen them? (I suspect "yes") and what if anything did they do with them.
Bill Burkett: Steering Committee, Van Os for Texas Democratic Chair 2002