Warren Commission Hearings and Exhibits The Warren Commission published 26 volumes of hearings and exhibits within a few months after issuing its Report. Volumes 1 - 5 are hearings conducted by the Commission members in Washington DC. Volumes 6 - 15 are hearings conducted by staff attorneys on location in Dallas, New Orleans, and other locations. Volume 15 also contains an index to names and exhibits. Volumes 16 - 26 contain photographed Commission Exhibits, usually abbreviated to CE (i.e., CE 399).