The Leo Frank trial was the 1913 Atlanta prosecution of a Jewish factory superintendent, Leo Frank, for the murder of thirteen-year-old Mary Phagan. Frank was convicted and sentenced to death in a courtroom so hostile that the judge sent him away before the verdict was read. After the governor commuted his sentence to life imprisonment in 1915, a group of prominent Georgians seized Frank from a state prison farm and lynched him. Georgia granted a posthumous pardon in 1986, worded to acknowledge the state’s failures rather than to declare him innocent.
The Murder and the Arrest
On April 26, 1913, Mary Phagan went to the National Pencil Company factory in Atlanta to collect her pay. She was thirteen and operated a knitting machine there. Early the next morning, a night watchman found her body in the factory basement. She had been strangled, and her body showed signs of a violent struggle.1Library of Congress. Trial and Lynching of Leo Frank: Topics in Chronicling America
Two handwritten notes were found near the body, one on a brown order blank and the other on a leaf from a scratch pad. Both described the killer as a “long tall negro black” and appeared designed to deflect suspicion. Who wrote them, and where, would be argued at every stage of the case.
Suspicion fell quickly on Leo Frank. He was the last known person to see Phagan alive, having paid her wages that afternoon. He was also a Northern-born Jewish man managing a factory of mostly young, local women in a city where industrialization had bred resentment toward the new industrial class. Atlanta police arrested him within days.
The Prosecution’s Case
Solicitor General Hugh Dorsey built his case around Jim Conley, an African American janitor at the pencil factory.2Digital Library of Georgia. Frank, Leo M.- Writings- Argument of Hugh M. Dorsey, Solicitor General of the Atlanta Judicial Circuit Conley gave police several conflicting accounts before his story settled. He first denied being at the factory, then admitted writing one of the notes at Frank’s request the day before the murder while insisting he was never at the scene, then said he was at the factory but knew nothing about the killing.
By trial, his account had firmed up. Conley testified that Frank summoned him to help move Phagan’s body from the second floor to the basement using the factory elevator, that Frank confessed to hurting the girl, and that Frank offered him money to help dispose of the body and keep quiet. Conley admitted writing the murder notes but said Frank had dictated them to frame a Black employee.
Dorsey supplemented Conley with factory workers who described Frank’s interactions with female employees as inappropriate, and he pointed to Frank’s visibly nervous behavior on the day the body was found. The physical evidence was thin. The prosecution theorized that the murder occurred near a lathe in a workroom adjacent to Frank’s office, based on what appeared to be bloodstains and strands of hair said to match Phagan’s. The defense challenged both claims.
After the trial, the forensic case weakened further. The doctor who had performed a microscopic examination of the hair told reporters the strands actually came from a different girl and that he had told the prosecution before trial. Dorsey did not disclose it. The jury never heard.
Frank’s Defense
Under Georgia law at the time, a criminal defendant could make an unsworn statement to the jury. Georgia Code Section 38-415 let a defendant address the court without taking an oath and without cross-examination, and the jury could give the statement whatever weight it chose.3Supreme Court of the United States. Ferguson v. Georgia Frank spoke for roughly four hours. He walked the jury through a minute-by-minute timeline of his office work, placing himself at his desk during the window when the killing was said to have occurred. He attributed his nervous demeanor to the shock of learning a young employee had been found dead in the building he managed.
Alibi witnesses backed him. Factory employees and visitors said they saw Frank in his office during the critical period. Character witnesses spoke to his reputation. Defense attorneys argued that Conley’s version was physically impossible: the elevator was loud enough that its use would have been noticed, and the timeline he described did not align with when the elevator was known to have been used.
A Trial Run Under Mob Pressure
Whatever the merits of the arguments, the proceedings began on July 28, 1913, in a courtroom packed with spectators. An overflow crowd pressed against the open windows in the summer heat, cheering the prosecution.4National Archives. Progressive Era: Leo Frank Petition Anti-Semitic hostility toward Frank and his lawyers ran through the trial.
The atmosphere grew alarming enough that the judge privately conferred with the Chief of Police of Atlanta and the Colonel of the Fifth Georgia Regiment about security. On the final day of arguments, spectators greeted the Solicitor General with applause, foot-stamping, and clapping as he entered.5Supreme Court of the United States. Frank v. Mangum, 237 U.S. 309 Atlanta newspapers ran sensationalist daily coverage that favored the prosecution. The agitator Tom Watson, through Watson’s Jeffersonian Magazine, cast the case in anti-Semitic terms and framed outside support for Frank’s defense as meddling by Northern and Jewish interests.
The Verdict
After less than four hours of deliberation on August 25, 1913, the jury found Frank guilty of murder. Frank did not hear the verdict read. The presiding judge, fearing the crowd would lynch Frank on the spot if he were acquitted or if the jury deadlocked, had privately urged defense attorneys to keep themselves and their client out of the courtroom when the decision came in. They agreed.4National Archives. Progressive Era: Leo Frank Petition
The reaction confirmed the judge’s fears about the crowd, if not the verdict itself. When the decision was announced, applause erupted so loudly the judge, sitting ten feet from the jury box, could barely hear the jurors polled. The celebration spilled into the streets.5Supreme Court of the United States. Frank v. Mangum, 237 U.S. 309 The next day, the judge sentenced Frank to death by hanging. Defense counsel immediately moved for a new trial, arguing the hostile atmosphere had denied Frank any chance of an impartial verdict.
Appeals and the Holmes Dissent
The Georgia courts affirmed the conviction at each stage, holding that the trial had been conducted within proper legal bounds despite the atmosphere. The case reached the United States Supreme Court as Frank v. Mangum, decided on April 19, 1915. Frank’s habeas corpus petition argued he had been denied due process under the Fourteenth Amendment because a mob-dominated trial was no trial at all. The majority disagreed, holding that due process required looking at the entire course of proceedings, including state appellate review. Because Georgia’s courts had considered and rejected the mob-domination claim, the majority concluded Frank had received sufficient procedural protection.6Justia U.S. Supreme Court Center. Frank v. Mangum, 237 U.S. 309
Justice Oliver Wendell Holmes dissented, joined by Justice Charles Evans Hughes. “Mob law does not become due process of law by securing the assent of a terrorized jury,” Holmes wrote. He argued that when the processes of justice are actually subverted by outside intimidation, no amount of procedural regularity on paper can cure the defect, and a federal court has jurisdiction to issue the writ regardless of what state courts concluded.5Supreme Court of the United States. Frank v. Mangum, 237 U.S. 309 The Holmes dissent later became the prevailing legal standard, effectively overruling the majority in subsequent cases.
Governor Slaton’s Commutation
With judicial appeals exhausted, Frank’s last hope was executive clemency. Governor John Slaton undertook an independent review of the trial record in the final days of his term and issued a lengthy commutation order that methodically dismantled the prosecution’s case.7Digital Library of Georgia. Supplement to the Message of the Governor to the General Assembly of Georgia, June 23, 1915 Slaton found that the murder notes matched Conley’s vocabulary rather than Frank’s, that physical evidence discovered after the trial suggested the notes were written in the basement near the body, and that the prosecution’s timeline for the elevator’s use was physically impossible. He also cited the suppressed hair evidence. In June 1915, days before leaving office, he commuted Frank’s sentence from death to life imprisonment.
The political cost was enormous. Mobs burned Slaton in effigy, and he required the Georgia National Guard to protect his home. His political career was finished. The commutation stood.
The Lynching
The commutation enraged those who wanted Frank dead. A group of prominent citizens from Marietta, near Mary Phagan’s hometown, organized to carry out the death sentence themselves. Calling itself the Knights of Mary Phagan, the group included a former governor, a state legislator, a judge, a solicitor general, and other socially prominent men.
On the night of August 16, 1915, the group drove to the state prison farm in Milledgeville where Frank was being held. Prison officials had reportedly been paid to look the other way. The men seized Frank and drove him roughly four hours to Frey’s Gin, an oak grove about two miles outside Marietta. At 7:05 the next morning, they hanged him. Within ninety minutes, a crowd of roughly a thousand people had gathered.
No one was ever arrested or prosecuted for the lynching, though the conspirators’ identities were widely known. Months later, many of the same men joined a nighttime ceremony at nearby Stone Mountain that established the modern Ku Klux Klan.
The 1986 Posthumous Pardon
For nearly seven decades, the case remained officially closed. In 1982, eighty-three-year-old Alonzo Mann came forward. Mann had been an office boy at the National Pencil Company in 1913. He said that on the day of the murder he saw Jim Conley on the first floor carrying the limp body of Mary Phagan toward the trap door leading to the basement. When Conley spotted him, he threatened to kill Mann if he ever told. Mann ran home; his mother told him to stay silent. His account, given under oath and supported by a polygraph, did not prove Frank’s innocence, but it corroborated the defense’s central claim that Conley acted alone.
The Georgia Board of Pardons and Paroles initially denied the petition in 1983, applying a standard that required proof of actual innocence. The board later reconsidered, acknowledging that such a standard was “almost impossible to satisfy” for a seventy-year-old case. On March 12, 1986, the board granted a posthumous pardon. The wording matters: the pardon did not declare Frank innocent. It was granted “in recognition of the state’s failure to protect the person of Leo Frank and thereby preserve his opportunity for continued legal appeal of his conviction, and in recognition of the state’s failure to bring his killer to justice, and as an effort to heal old wounds.”
Why the Case Still Matters
The trial’s open anti-Semitism and the lynching that followed struck fear into Jewish communities across the South for decades and spurred the creation of the Anti-Defamation League in 1913. The men who lynched Frank helped revive the Ku Klux Klan as a mass movement through the second Stone Mountain ceremony, launching a Klan that would grow to millions in the 1920s and direct its hatred at Black Americans, Jews, Catholics, and immigrants.
The Holmes dissent in Frank v. Mangum proved equally lasting. His insistence that mob-dominated trials cannot satisfy due process, even when state appellate courts approve the result, eventually became settled constitutional law and helped establish the principle that federal courts can look behind state criminal proceedings when fundamental fairness is at stake.6Justia U.S. Supreme Court Center. Frank v. Mangum, 237 U.S. 309