Oops, peeked out of the rabbit hole again. What is the MATTER with me, dammit? 

It occurred to me that, contrary to Pat Speer's assertion, Pitzer must have had greater expertise than merely closed-circuit TV. Indeed, he did. This is from a pretty comprehensive article in Grokipedia:

"Pitzer enlisted in the United States Navy in 1934, underwent training in X-ray technology, and was discharged in 1939."
...
"In these post-war capacities, Pitzer served as assistant head of the Medical Graphic Arts Department at the Naval Medical School in Bethesda, overseeing the creation and dissemination of visual educational materials for naval medical training. He also held the position of chief of the Television Division, pioneering the integration of closed-circuit television as an instructional tool to enhance medical instruction and procedural demonstrations for Navy personnel. These roles emphasized his earlier expertise in X-ray technology and photography, adapted to support broader medical education initiatives within the Bureau of Medicine and Surgery."
...
"Pitzer's responsibilities encompassed overseeing the technical operations of filming, editing, and distributing educational videos to support courses in anatomy, pathology, and clinical skills, leveraging his prior experience in X-ray technology and photography from his early Navy service. The division's work aligned with mid-20th-century advancements in medical education, where audiovisual aids improved retention and practical instruction for corpsmen, nurses, and physicians across naval facilities."
...
"As chief of the Educational Television Division and assistant head of the Medical Graphic Arts Department at the National Naval Medical School in Bethesda, Maryland, from 1961 until his death in 1966, Lieutenant Commander William Bruce Pitzer oversaw the production and management of audiovisual materials for medical training, including closed-circuit television recordings of procedures conducted at the National Naval Medical Center. This role positioned him to handle documentation from autopsies and other forensic examinations, as the facility routinely performed such procedures for military personnel and utilized graphic arts and video for instructional purposes, such as creating films of surgical and pathological processes."
...
"Pitzer's responsibilities extended to the hospital's closed-circuit television system, which he had employed in prior years to produce educational movies, potentially enabling remote capture or review of sensitive medical events without direct physical presence in the procedure room. Official records confirm that the Bethesda facility, where numerous autopsies occurred, equipped its audiovisual department under Pitzer's purview with tools for photographing, filming, and archiving post-mortem imagery to support Navy medical education and research."

It thus would seem that whatever David described Pitzer doing in his office would not have been inherently implausible.

Re: Before which of the three shots did JFK and Jackie wave to Mary Moorman?

Compare the Mary Rattan affidavit, dated 22 November 1963, with the fake one which doesn't even identify the "notary"