When did "Knudsen tell the HSCA that he did not take photographs"? Exact quote please.
Right here:
Mr. PURDY - When did you first become aware of the existence of photographs of the autopsy of President Kennedy?
Mr. KNUDSEN - The morning following the autopsy, Dr. Berkley -- to the best of my knowledge, Dr. Berkley had the film holders in a brown paper bag and handed them to me. Jim Fox, the Secret Service expert, was told to go over and develop them and see that they were secure at all times.
Mr. PURDY - Did you ever have knowledge of, or were you ever told about, autopsy x-rays, for example?
Mr. KNUDSEN - No. I do not know that any were ever taken.
If Knudsen did know about the photos until the next morning, then he didn't take them. Not knowing if x-rays were taken is another, if a bit more subtle, giveaway.