Original 35mm black and white negative taken by unidentified Dallas Times Herald staff photographer. This image shows Dallas police officer Kenneth Heard and other unidentified Dallas police officers standing guard outside the Dallas Trade Mart on November 22, 1963. The negative is on Kodak Tri-X Pan Film. The image is labeled #6 on section 1 of negative strip 18.The old TMS record for the images on this negative strip did not identify a photographer. Based on research conducted by collections intern Mark Davies in June and July 2012, curatorial and collections staff concluded that while the specific photographer cannot be identified, we do know it was one of three men: There were three DTH photographers whose schedules might have allowed them to take these pictures - Eamon Kennedy, Bill Beal and John Mazziotta. One of them took these photos. Bob Jackson, who was at Parkland earlier, did not take these photographs. Also noted at the 2012 curatorial meeting: the photographer for this strip started at the Trade Mart then went to Parkland. Could check Eamon Kennedy's oral history for more information. (Lindsey Richardson, 7/24/2013)Dallas Police Officer Kenneth Heard and others on guard at the Trade Mart