Copyright -- Contents -- EXECUTIVE SUMMARY -- I. INTRODUCTION AND OVERVIEW -- II. DESCRIPTION OF STUDIES BY BRSW AND WA -- III. EVALUATION OF THE BRSW AND WA METHODOLOGIES AND CONCLUSIONS -- IV. TIMING EVIDENCE FROM MATCHING FEATURES -- IV-1. SOUND SPECTROGRAMS -- IV-2. ANALYSIS OF SOUND SPECTROGRAMS OF "HOLD EVERYTHING..." -- IV-3. TIMING OF CHANNEL I AND CHANNEL II EVENTS -- IV-4. POSSIBILITY OF SUPERPOSED RECORDINGS -- V. EVALUATION OF THE FBI REPORT -- VI. POSSIBLE FURTHER STUDIES -- VII. CONCLUSIONS -- APPENDIX A CRITICISM OF PROBABILITY CALCULATIONS -- A-L. CRITICISM OF BRSW PROBABILITIES 0.88, 0.88, 0.50, AND 0.75 -- A-2. CRITICISM OF BRSW CERTAINTY THAT MICROPHONE DETECTED SOUND OF GUNFIRE (P. 64) -- A-3. CRITICISM OF BRSW/WA PROBABILITY OF 0.95 FOR SHOT FROM GRASSY KNOLL -- APPENDIX B ANALYSES OF SOUND SPECTROGRAMS OF "HOLD EVERYTHING..." -- B-1. TIME AND FREQUENCY ANALYSIS -- B-2. MEAUSREMENTS OF EASILY IDENTIFIED FREQUENCY RATIOS ON SOUND SPECTROGRAMS -- B-3. ALTERNATIVE TIME AND FREQUENCY ANALYSES OF SOUND SPECTROGRAMS -- a) Initial experiments -- b) A more objective experiment on the timing -- c) A more objective experiment on the frequencies -- B-4. DIGITAL CALCULATIONS OF CROSS CORRELATIONS BETWEEN CHANNEL I ANDCHANNEL II -- APPENDIX C TIMING OF CHANNEL I AND II EVENTS -- C-1. ANALYSIS OF BOWLES TAPES -- Channel I Recording -- Channel II Recording -- a. Gap -- b. Speed Compensation -- c. Repeats -- d. Silences -- Results -- C-2. ANALYSIS OF TAPES MADE DIRECTLY FROM ORIGINAL RECORDS -- Channel I Recording -- Channel II Recording -- Results -- APPENDIX D POSSIBILITY OF SUPERPOSED RECORDINGS -- APPENDIX E SIREN SOUNDS -- APPENDIX F POSSIBLE FURTHER STUDIES.