And here is DeMohrenschildt's account of the meeting. This is after Oswald showed him his rifle and he asked why he had one. Note as well Oswald told Walker he took the rifle to target shoot. This supports, to me, Marina's account about Oswald being reticent to discuss the shooting.
Mr. De MOHRENSCHILDT. He said "I go out and do target shooting. I like target shooting." So out of the pure, really jokingly I told him "Are you then the guy who took a pot shot at General Walker?" And he smiled to that, because just a few days before there was an attempt at General Walker's life, and it was very highly publicized in the papers, and I knew that Oswald disliked General Walker, you see. So I took a chance and I asked him this question, you see, and I can clearly see his face, you know.
He sort of shriveled, you see, when I asked this question.
Mr. JENNER. He became tense?
Mr. De MOHRENSCHILDT. Became tense, you see, and didn't answer anything, smiled, you know, made a sarcastic--not sarcastic, made a peculiar face.
Mr. JENNER. The expression on his face?
Mr. De MOHRENSCHILDT. That is right, changed the expression on his face.
Mr. JENNER. You saw that your remark to him----
Mr. De MOHRENSCHILDT. Yes.
Mr. JENNER. Had an effect on him.
Mr. De MOHRENSCHILDT. Had an effect on him. But naturally he did not say yes or no, but that was it.
For some reason Oswald no longer wanted to talk about Walker.