Opening the Consequences Stage

Seen from above in the weeks after the assassination, Washington City was a grid of containment. Patrols moved through the streets, the Potomac bridges stood guarded, and prisons had swollen beyond capacity, holding the human debris of conspiracy. From the skeletal dome of the unfinished Capitol, one unresolved disposal persisted as a clandestine administrative problem amidst the suspended peace. The body of John Wilkes Booth, officially identified aboard the USS Montauk, had been certified but not yet disposed of—a burden of proof without the proof’s object for the coming trial of his alleged accomplices.

The descent from this aerial view lands in a third-floor room of the Old Capitol Prison, a converted boardinghouse on the corner of First and A Streets Northeast. The building had served this function before, housing Confederate prisoners and political detainees through four years of war. Now, on the morning of May 9, 1865, it contained a court. Nine military officers occupied a raised platform improvised from carpentered boards. Before them sat the accused: eight prisoners arranged in two rows, flanked by armed guards with fixed bayonets. The room was hot. Windows had been nailed shut or barred. The public was excluded; what press access existed operated under War Department supervision.

Major General David Hunter presided, a one-armed veteran of the Western campaigns who had burned his way through the Shenandoah Valley under Grant’s orders. The other commissioners included Brigadier General August Kautz, who had commanded cavalry in the Petersburg siege; Brigadier General Albion Howe, whose military career had stalled after political controversies; and six additional officers selected by Stanton’s office for their reliability. Only one, Lewis Wallace, possessed legal training. Wallace had served as a major general in the field and would later write Ben-Hur. He understood courts-martial. Whether this tribunal resembled any court-martial he had known was a question he kept to himself.

The prisoners sat in alphabetical order as the charges were read. David Edgar Herold, born June 16, 1842, listened to his name coupled with conspiracy to murder the President; he had been captured with Booth at the Garrett farm after guiding the wounded actor through twelve days of flight.

George Atzerodt, a German-born carriage painter assigned to kill Vice President Johnson, had instead drunk himself into paralysis at a Washington hotel.

Samuel Arnold and Michael O’Laughlen, former schoolmates of Booth’s, had withdrawn from the original kidnapping plot before it became murder but had not reported what they knew.

Edman Spangler faced the lightest charge: assisting Booth’s escape from Ford’s Theater. Samuel Alexander Mudd Sr., who had set Booth’s broken leg, sat rigid in his black suit; he had been arrested at his Maryland farm on April 26.

Lewis Powell, who had nearly killed Secretary Seward with a knife three days before his capture at Mary Surratt’s boardinghouse, sat among them.

And Mary Surratt herself—forty-two years old, widow of a Confederate agent—wore a shawl across her shoulders as she sat apart from her fellow prisoners: she was alone among them in being a woman.

The specific charges ran to hundreds of words: maliciously, unlawfully, and traitorously combining with John Wilkes Booth to kill Abraham Lincoln, in violation of the laws and customs of war. That phrase mattered. A military tribunal rather than a civilian court was chosen because government officials believed its more lenient rules of evidence would enable them to get to the bottom of what many then perceived as a vast conspiracy. The war was over; its legal framework persisted.

Judge Advocate General Joseph Holt led the prosecution—a man who had served as Buchanan’s Secretary of War and remained loyal to the Union when others did not. Holt was assisted by John A. Bingham and Major Henry Lawrence Burnett: Bingham was a Radical Republican congressman from Ohio who would draft part of what became known as Reconstruction’s legal architecture; Burnett was an experienced prosecutor who would bring his own judgment to bear on questions that no statute could fully answer.

The mechanism’s inner workings revealed themselves in the rules. Hearsay evidence was admissible. The defendants could not testify in their own defense—this privilege, standard in civilian courts, had no place in military law. The commission itself would determine the relevance of evidence, without appeal to higher authority. The standard of proof was that which would satisfy military men in the exercise of a sound discretion, a formulation that placed judgment in the hands of officers who had spent the war years accepting or rejecting intelligence reports, executing orders, and calculating acceptable losses. The trial’s structure was not an accident of haste but a deliberate wartime measure that would become the source of lasting historical and legal controversy.

For the prosecutors, the immediate consequence was the necessity of assembling a coherent narrative from the chaos of the manhunt.

They had Booth’s diary, recovered from his body and examined by Stanton personally before reaching Holt’s desk. They had the testimony of detectives who had raided the Surratt boardinghouse, of soldiers who had pursued the fugitives through Maryland and Virginia, of the Garrett family who had harbored the assassin in their barn. They had contradictory accounts of who had said what at which meeting, of whether Mudd had recognized Booth when he treated the broken leg, of how much Mary Surratt had known when she delivered a package to Surrattsville on April 14.

The rules allowing hearsay evidence served a practical function: they permitted the introduction of statements made during the manhunt, of confessions extracted under pressure, of rumors that had circulated through the War Department’s intelligence network. The prosecution did not need to prove each element beyond reasonable doubt; they needed to construct a story that would satisfy nine military officers already disposed to believe in Confederate conspiracy.

For the defendants, the consequences were immediate and isolating. They were held in separate cells, denied communication with each other, visited only by counsel approved by the War Department. Mary Surratt’s son John, the original object of the manhunt, remained at large; this fact was used against her as evidence of familial guilt.

Herold, the youngest prisoner at twenty-two, had provided detailed statements about the flight from Washington, implicating Mudd and attempting to exculpate himself; these statements were now evidence against him and others. Powell, the most physically imposing of the accused, had been beaten during his capture and arrived at the prison with visible injuries; no record was made of how they were acquired.

Mudd maintained his innocence with the stubbornness of a man who had built a life on respectability, a physician and slaveholder who had never joined the Confederate army and who insisted he had been deceived about his patient’s identity. The rules denying them the right to testify meant that these personal narratives could reach the commission only through the questions their counsel were permitted to ask, through the documents they could introduce, through the inferences the military judges chose to draw.

The public, excluded from the courtroom, received a curated version of proceedings. War Department telegrams controlled the flow of information. Newspaper correspondents submitted their copy to military censors. Some papers carried reports of the prisoners’ demeanor. The National Intelligencer noted the solemnity of the commission’s deliberations. Readers learned of the evidence presented in summary form, stripped of context. What they did not receive was the texture of the courtroom: the heat, the fixed bayonets, the absence of civilian legal norms, the sense that the verdict had been determined before the first witness was called. The contrast between this shadowy process and the public expectation of open justice created a tension that would persist through the trial and beyond.

Stanton’s desired outcome shaped every procedural choice. Swiftness was essential. The commission convened on May 9; the first witness was called on May 12. The prosecution planned to present its entire case within weeks, to secure convictions before the public’s attention wandered, before political opposition could organize, before the legal irregularities could be fully examined. The Judge Advocate General’s office had prepared binders of evidence: maps of Booth’s route, copies of the reward notices, transcripts of preliminary interrogations, the physical objects recovered from the fugitives—Booth’s weapons, his field glasses, the photographs he had carried, the money in his pockets. The trial machinery was designed to process this material efficiently, to transform the chaotic intelligence of the manhunt into a coherent record of guilt.

The commissioners themselves embodied the unresolved tensions of the war’s aftermath. Hunter had burned civilian property under orders he considered lawful; now he would judge whether conspiracy to assassinate a president violated the laws of war. Kautz had accepted the surrender of Confederate forces at Petersburg; now he would determine whether former Confederates and their associates could be tried as combatants. Wallace, the only lawyer, understood that the tribunal’s procedures would not survive scrutiny in a civilian appellate court; he also understood that no such appeal was possible. The commission’s authority derived from the President’s war powers, exercised through the Secretary of War, and Andrew Johnson—Lincoln’s successor, a Democrat with Confederate sympathies in his own background—had shown no inclination to interfere with Stanton’s management of the case.

The prisoners’ fates began to take shape in these early sessions. Herold’s detailed confession, given freely in the days after his capture, provided the prosecution with a narrative thread: the meeting at the Surratt tavern, the stop at Mudd’s farm, the days in the pine thicket with Thomas Jones, the failed crossing of the Potomac, the final arrival at the Garrett farm. Each name Herold mentioned became a target for investigation, each location a site for evidence-gathering. Jones, the Confederate agent who had supplied Booth with food and navigation, was arrested on May 10; his testimony would be sought to corroborate Herold’s account and to establish the continuing existence of Confederate underground networks. The Garrett family, who had testified before military investigators, were kept available for the commission’s call. The manhunt’s chaotic intelligence was being systematized into legal proof, its disparate arrests woven into a single conspiracy.

Mary Surratt’s position was particularly exposed. The prosecution intended to demonstrate that her boardinghouse had served as the conspiracy’s headquarters, that she had carried messages between Booth and her son John, that her delivery of a package to Surrattsville on the afternoon of April 14 had been a prearranged signal. The evidence was circumstantial: the testimony of boarders who had seen Booth visit, of neighbors who had observed Confederate officers coming and going, of Louis Weichmann, a government clerk who had rented a room at the house and who would become the prosecution’s key witness. Weichmann had known John Surratt since their school days, had observed the meetings at the boardinghouse, had traveled with John Surratt to Richmond on Confederate business in March 1865. His testimony would link the Surratt family directly to Confederate intelligence operations, transforming the boardinghouse from a neutral location into a Confederate cell.

The defense counsel, assigned by the War Department, faced structural obstacles. Frederick Aiken and John W. Clampitt, representing Mary Surratt, were young lawyers with no previous connection to their client. Thomas Ewing Jr., representing Mudd, Herold, and Arnold, was a prominent Kansas attorney and former Union general, but his military background did not translate into influence with the commission. William E. Doster, representing Atzerodt and Powell, had served as provost marshal of Washington during the war; his familiarity with military justice informed his understanding of its limitations. These men could cross-examine witnesses, object to evidence, present such documents as they could obtain; they could not alter the rules that governed the proceedings, could not appeal to civilian authority, could not prevent their clients from being tried together in a single proceeding that encouraged guilt by association.

The trial’s early days established patterns that would persist. The prosecution called witnesses in sequences designed to build narrative momentum: first the identification of Booth’s body and the objects found on it, then the pursuit and capture of the fugitives, then the meetings and conversations that constituted the alleged conspiracy. The defense struggled to establish alternative explanations: that Mudd had not recognized Booth, that Surratt had been unaware of her son’s activities, that Herold had been a follower rather than a planner, that Atzerodt’s drunkenness demonstrated his withdrawal from the plot. Each such argument required the commissioners to accept a version of events that contradicted the prosecution’s seamless narrative of Confederate conspiracy. The rules of evidence, skewed toward the prosecution, made this burden nearly impossible to carry.

The physical conditions of the trial reinforced its exceptional character. The prisoners were brought to the courtroom each morning under armed escort, seated in assigned places, forbidden to communicate with each other or with spectators. The commissioners sat above them, the prosecutors to one side, the defense counsel to the other, in a room designed for surveillance rather than justice. The windows that had been nailed shut prevented any view of the city outside, any reminder of the civilian world in which legal norms had operated before the war and would presumably operate again. The trial was a sealed environment, a controlled space in which the War Department could process the consequences of the assassination without interference from the ordinary mechanisms of law.

Stanton observed the proceedings through reports delivered each evening. The Secretary of War had not attended the opening session; his presence would have suggested political interference in a military proceeding. But his influence was present in every procedural choice, in the selection of commissioners, in the rules of evidence, in the decision to try the defendants together rather than separately. The urgency that had characterized the twelve-day manhunt extended seamlessly into this judicial reckoning. The same institutional machinery that had distributed reward notices, coordinated cavalry searches, and processed telegraphic intelligence was now assembling a legal record that would assign collective guilt and achieve political closure.

The prisoners understood, with varying degrees of clarity, that their fates were being determined in this room. Herold, who had talked freely after his capture, now sat silent, watching the witnesses with the frightened attention of a young man comprehending the consequences of his cooperation. Mudd maintained the rigid posture of a professional man confronted with professional ruin, his medical practice destroyed, his property subject to confiscation, his reputation transformed from respected physician to Confederate accomplice. Powell, the man who had come closest to completing the conspiracy’s full design, showed no visible reaction to the proceedings, his face marked by the injuries of his capture and his own apparent indifference. Mary Surratt sat with her hands folded, occasionally requesting water, her composure noted by correspondents who would describe her as resigned or defiant depending on their political sympathies.

The trial machinery was grinding forward, prefiguring its outcomes, and raising the unresolved question of what final physical and symbolic closure would look like for both the conspirators and Booth’s remains. The commission would render its verdicts; the President would approve the sentences; the executions would proceed in the Washington Arsenal yard, visible to invited witnesses, reported to the public as the completion of justice.

But the body of John Wilkes Booth, officially identified but not yet disposed of, remained in War Department custody, its fate still undetermined. The clandestine burial that Stanton had ordered, the secret interment in the Arsenal cellar, would serve as the physical counterpart to this legal process: hidden, unmarked, designed to prevent the grave from becoming a site of Confederate memory. The two processes—public trial and secret burial—were complementary mechanisms for managing the consequences of assassination, each shaped by the same institutional logic of swift, definitive, controlled closure.