Don Thomas addresses a public forum to answer questions about the conspiracy to destroy Booths diary confession. Eight days after shooting Lincoln, Booth .brTwo years after the conspiracy trial ended Congress discovered that the military prosecution suppressed evidence written by John Wilkes Booth during his .brAuthor of the Reason Lincoln had to Die. .brDuring the Judiciary investigation into Booths diary, the detective who recovered the diary from Booths body inadvertently exposed the reason why the military .