The Leo Frank case was the 1913 prosecution, conviction, and eventual 1915 lynching of a Jewish factory superintendent in Atlanta for the murder of thirteen-year-old Mary Phagan, a proceeding so distorted by anti-Semitism and mob pressure that it produced a landmark Supreme Court dissent, ended a governor’s career, helped launch both the Anti-Defamation League and the second Ku Klux Klan, and ended with a posthumous state pardon seventy-one years later.
The Murder of Mary Phagan
On April 26, 1913, Confederate Memorial Day and a factory holiday, thirteen-year-old Mary Phagan walked to the National Pencil Company in Atlanta to collect $1.20 in wages. She had recently been laid off because the factory had run short of materials for her job. She went to the superintendent’s office to pick up her pay from Leo Frank, and her family never saw her alive again.
Early the next morning, night watchman Newt Lee found Phagan’s body in the factory basement. A cord was wrapped around her neck. Near the body were two notes scrawled on scrap paper, written in the first person as if from the victim’s perspective. Their confused language pointed more to the author’s illiteracy than to any reliable description of the killer.
The investigation was botched from the start. Detectives left bloody fingerprints on a basement door and on the victim’s jacket without testing them. Authorities theorized that the murder happened near a metal lathe in a workroom next to Frank’s office, based on stains and hair strands that seemed to match Phagan’s, but the contaminated crime scene left the physical evidence inconclusive. Suspicion initially fell on the watchman and other factory employees. As public pressure built, police shifted their focus to Frank, the last person known to have seen Phagan alive.
Who Was Leo Frank
Frank managed the National Pencil Company, which employed roughly 170 workers, many of them young women and girls. He was Jewish, a Northerner running a Southern factory in a deeply Protestant city. Atlanta in 1913 was a place where rapid industrial growth had pulled rural families into the city and where resentment ran deep toward factory owners seen as outsiders profiting from cheap Southern labor. One historian described Frank as having become “a symbol of the northern capitalist exploiting southern womanhood.” That sentiment shaped everything that followed.
The Trial and the Testimony of Jim Conley
The trial opened on July 28, 1913, with Solicitor General Hugh Dorsey leading the prosecution. Physical evidence tying Frank to the killing was almost nonexistent. Dorsey built his case on character attacks and on the testimony of factory workers who suggested Frank had behaved improperly around female employees.
The state’s star witness was Jim Conley, a factory sweeper with a criminal record who admitted writing the notes found near the body. Conley claimed Frank had summoned him to help move Phagan’s body from the second floor to the basement in the elevator, and that Frank had dictated the notes to him to deflect suspicion. On cross-examination, Conley conceded he had changed his story multiple times. Asked directly whether he had lied throughout the process, he replied, “I told some stories, I’ll admit.” He could not remember how many versions he had given police.
Frank’s defense argued that Conley’s timeline was physically impossible given the building’s layout and contradicted by other witnesses. Defense attorney Reuben Arnold told jurors that “if Frank hadn’t been a Jew he never would have been prosecuted.” That was not rhetoric. One juror, a buggy salesman named Atticus Henslee, had been quoted at the Atlanta Elks Club shortly after the indictment saying, “I’m glad they indicted the goddamn Jew. They ought to take him out and lynch him, and if I get on that jury I’ll hang that Jew for sure.”
Hostile spectators packed the courtroom throughout the twenty-five-day trial, and crowds outside cheered the prosecutor. The atmosphere grew so threatening that Judge Leonard Roan suggested Frank and his lawyers leave the courtroom before the verdict, fearing for their safety if the jury returned anything other than a conviction. The jury deliberated less than two hours before convicting Frank of murder. He was sentenced to death by hanging.
The Role of Anti-Semitism
Anti-Semitism was the engine of the case, not a background factor. Atlanta’s newspapers sensationalized every detail, and Frank’s Jewish identity became inseparable from the narrative of a wealthy outsider preying on a poor Southern girl.
The most sustained campaign came from Tom Watson, a former Populist politician turned publisher, who used his newspaper, the Jeffersonian, to attack Frank in explicitly anti-Semitic terms. Watson accused “Jew money” of corrupting the justice system, writing that Jewish interests had “debased us, bought us, and sold us.” His editorials cast any effort to overturn the conviction as Northern and Jewish meddling in Southern affairs. His readership swelled, and his influence extended well beyond the press. He pressured the governor to let the death sentence stand and later urged violence against both Frank and the governor who tried to save him.
Frank v. Mangum and the Holmes Dissent
Frank’s lawyers filed repeated motions for a new trial, arguing that jury intimidation and mob pressure had made a fair proceeding impossible. Georgia’s courts denied every motion. The case reached the Supreme Court as Frank v. Mangum, 237 U.S. 309 (1915).
Frank’s team argued that a trial dominated by a mob was an empty form, incapable of delivering due process regardless of what procedural boxes the state had checked. The majority disagreed. The Court held that when a state’s appellate courts have reviewed allegations of mob domination and found them groundless, federal courts cannot override that conclusion. Because Georgia’s courts had examined and rejected the claims, Frank had received adequate judicial review, and the Fourteenth Amendment required no particular form of procedure so long as the defendant had notice and an opportunity to be heard before a competent tribunal.1Justia. Frank v. Mangum, 237 U.S. 309 (1915)
Justices Oliver Wendell Holmes and Charles Evans Hughes dissented. Holmes wrote that habeas corpus “cuts through all forms and goes to the very tissue of the structure,” and that a mob-dominated trial amounts to “an empty shell.” His central line was blunt: “Mob law does not become due process of law by securing the assent of a terrorized jury.” When the facts alleged, if true, mean the trial court lost jurisdiction, Holmes wrote, no amount of state appellate review can cure the defect, and the federal courts have a duty to intervene.1Justia. Frank v. Mangum, 237 U.S. 309 (1915)
The majority opinion stood. Frank’s death sentence remained in place, and his judicial options were exhausted.
Governor Slaton’s Commutation
The case moved to Georgia Governor John M. Slaton in June 1915. Slaton was a respected lawyer nearing the end of his term and widely expected to run for the U.S. Senate. He reviewed more than 10,000 pages of trial transcripts and visited the pencil factory himself to test whether the prosecution’s version of events was physically possible.2New Georgia Encyclopedia. Leo Frank Case
Slaton concluded that Frank was likely innocent. He found Conley’s testimony deeply unreliable and irreconcilable with the physical layout of the building and the timeline other witnesses had established. Rather than issue a full pardon, Slaton commuted the death sentence to life imprisonment, believing that Frank’s innocence would eventually be established through the normal legal process.2New Georgia Encyclopedia. Leo Frank Case
The reaction was ferocious. Riots broke out across Atlanta. A stone- and bottle-hurling mob of roughly 4,000 people marched on the governor’s mansion, and Slaton declared martial law and called out the National Guard to protect his family. When his term ended a few days later, police escorted the Slatons to the railroad station. They left Georgia and did not return for a decade. The commutation destroyed one of the most promising political careers in the state.
The Lynching
An organized group calling itself the “Knights of Mary Phagan” began planning a response almost immediately. The group included prominent citizens with the resources to carry out what amounted to a paramilitary operation. On the night of August 16, 1915, armed men arrived at the state prison farm in Milledgeville, where Frank had been transferred for his safety. They cut the telephone lines, overpowered the guards without firing a shot, and took Frank from his cell.3National Archives. Progressive Era: Leo Frank Petition
They drove Frank through the night to a site about two miles from Phagan’s hometown of Marietta. On the morning of August 17, they hanged him from an oak tree. The planning and discipline of the operation reflected the social standing of its organizers. No one was ever prosecuted for the kidnapping or the killing. Georgia had failed completely to protect a prisoner in its custody.
The 1986 Posthumous Pardon
For nearly seven decades, the case lay dormant. In 1982, an eighty-three-year-old Virginian named Alonzo Mann came forward. Mann had been a fourteen-year-old office boy at the National Pencil Company on the day of the murder. He said he had seen Jim Conley carrying Phagan’s limp, unconscious body toward the trap door leading to the basement, and that Conley had threatened to kill him if he ever told. Mann had stayed silent as a frightened boy.
His account helped fuel a formal petition to the Georgia Board of Pardons and Paroles. The board did not declare Frank innocent, concluding that the passage of time made a definitive determination of guilt or innocence impractical. In 1986, it granted a posthumous pardon on narrower grounds, citing the state’s failure to protect Frank while he was in custody and its failure to bring his killers to justice. The pardon acknowledged that Georgia had allowed a mob to override the rule of law, depriving Frank of his constitutional right to continued legal appeal.3National Archives. Progressive Era: Leo Frank Petition
The pardon did not formally clear Frank of the murder charge. It addressed the state’s misconduct rather than the underlying question of guilt.
Legal and Cultural Legacy
Three consequences of the case reach into the present.
The Founding of the Anti-Defamation League
In direct reaction to the anti-Semitism that saturated the Frank trial, the B’nai B’rith Society founded the Anti-Defamation League in 1913 to combat anti-Jewish bigotry and other forms of prejudice.3National Archives. Progressive Era: Leo Frank Petition The ADL traces its origin directly to the atmosphere surrounding the case.
The Revival of the Ku Klux Klan
Shortly after the lynching, members of the Knights of Mary Phagan gathered on a mountaintop near Atlanta and formally reconstituted the Ku Klux Klan, which had been largely dormant since Reconstruction. This second Klan grew into a nationwide organization with millions of members during the 1920s, targeting Black Americans, Jews, Catholics, and immigrants. The Frank lynching was the founding act of the twentieth-century Klan.
The Expansion of Federal Habeas Corpus
The Holmes dissent in Frank v. Mangum lost in 1915 and won in the long run. Eight years later, in Moore v. Dempsey, 261 U.S. 86 (1923), the Supreme Court confronted another mob-dominated trial, this one involving Black defendants convicted of murder in Phillips County, Arkansas. Writing for the majority, Holmes adopted the reasoning from his own earlier dissent. When a federal judge is presented with allegations that, if true, would make a state trial “absolutely void,” the judge must examine the facts independently rather than defer to the state courts. Moore v. Dempsey cracked open the door for federal courts to review state criminal convictions on constitutional grounds, a principle that expanded over the following decades and remains a cornerstone of habeas corpus law.