 For some observers this called into question the allegations against Rove, who had signed a waiver months before permitting reporters to testify about their conversations with him (see above paragraph).Cooper, however, stated in court that he did not previously accept a general waiver to journalists signed by his source whom he did not identify by name, because he had made a personal pledge of confidentiality to his source.The 'dramatic change' which allowed Cooper to testify was later revealed to be a phone conversation between lawyers for Cooper and his source confirming that the waiver signed two years earlier applied to conversations with Cooper.