Saundra Kay Spencer developed photographs from the autopsy of President Kennedy on the weekend following the assassination. She worked at the Naval Photographic Center in Anacostia, in the "White House lab." Her liaison to the White House was Robert Knudsen, and she worked with Vince Madonia. Ms. Spencer, never before interviewed in association with this case. This is her compete ARRB Interview .  
Here is a link to the compete HSCA testimony of Robert Knudsen White House photographer during the Kennedy administration. 
https://www.maryferrell.org/showDoc.html?docId=666