In Washington, President Johnson orders a military trial for John Wilkes Booth's accused fellow plotters
Based on Attorney-General Speed's ruling, President Johnson ordered by proclamation a military trial for John Wilkes Booth's surviving accused co-conspirators complicit in the plot against Abraham Lincoln. Judge-Advocate-General Joseph Holt was to take charge personally of the proceedings and name nine qualified officers to serve as the court. The nine officers were named five days later and trial began in earnest of May 11, 1865. (By John Osborne)
Clara E. Laughlin, The Death of Lincoln: The Story of Booth's Plot, His Deed and the Penalty (New York: Doubleday, Page and Company, 1909), 171.