Volume II of the HSCA hearings volumes consists of the proceedings of Sept. 11 through 15. 1978. The transcripts of these days includes testimony about acoustics evidence, trajectory analyses, the testimony of accused assassin Lee Harvey Oswald's wife Marina, photographic analysis, and testimony concerning Yuri Nosenko, a Soviet defector.

The testimony of Sept. 11 was concerned with analysis of an audiotape purported to have captured the shooting in Dealey Plaza. It was recorded on a Dallas Police radio channel due to a stuck-open microphone on a police motorcycle. The acoustic analysis showed at least 4 shots, with one of these coming from the "Grassy Knoll." This conclusion was subsequently disputed by a panel appointed by the National Academy of Sciences, but that rebuttal itself has been called into question by a recent peer-review article by D.B. Thomas presented in Science and Justice in 2001.

The Sept. 12 proceedings began with the testimony of Calvin McCamy concerning the Zapruder film, and what a detailed analysis showed about when shots may have been fired. This was followed by a trajectory analysis presented by Thomas Canning.

The next day of proceedings, and part of the following, was taken by the testimony of Marina Oswald Porter, former wife of Lee Harvey Oswald. Following that was testimony by members of the Photographic Panel, who examined the famous "Oswald backyard photos" among other photographic evidence relevant to the assassination.

The photographic testimony continued into Sept. 15, followed by the testimony of John Hart. Mr Hart discussed the case of Yuri Nosenko, a Soviet officer who defected to the U.S. in early 1964. Nosenko's "bona fides" were a subject of great contention within the CIA, which imprisoned and interrogated Nosenko for a period of three years.