Howard Willens, in his book “History Will Prove Us Right” pp 88-89 sheds more light on the context of Redlich’s memo:
We had another witness on the stand later in the month whose testimony involved Marina Oswald. After the assassination, she had hired James Martin as her business manager to deal with her extraordinary situation. By February, our lawyers had some concern that he was taking advantage of her—both financially and personally. The FBI and the Secret Service provided the commission with evidence that they were sleeping together.10 Within the staff, we debated whether the commission needed to delve into that relationship. As he had done with Marina Oswald, Redlich had prepared for Martin’s appearance. The commission had requested Martin to bring all documents relating to “any conversations and advice, instructions and other material of that kind concerning the testimony of Mrs. Marina Oswald or preparation of articles by her, or other things of that character.”11 Warren severely restricted Redlich’s interrogation of Martin. He “stated very definitely he believed that neither the character of Marina Oswald nor the business relationships” between her and Martin “were of interest to the Commission.” Redlich strongly disagreed with the chief justice’s decision. In a memo to Rankin the next day, he said bluntly: “We cannot ignore, however, that Marina Oswald has repeatedly lied to the Secret Service, the FBI, and this Commission on matters which are of vital concern to the people of this country and the world.” He believed that the commission had an obligation to pursue all possible motives that might have prompted Oswald’s assassination of the president. One of those motives might have resulted from his wife’s actions. For this reason Redlich thought that Marina Oswald’s character, her moral fiber, fell well within the reach of our investigation.12