two celebrated Chicago murderers of 1924, who confessed to the kidnapping and murder of 14-year-old Robert (“Bobbie”) Franks for an “intellectual” thrill. Pleading guilty, Nathan F. Leopold, Jr. (in full Nathan Freudenthal Leopold, Jr.; b. Nov. 19, 1904, Chicago, Ill., U.S.—d. Aug. 29, 1971, San Juan, P.R.), and Richard A. Loeb (b. June 11, 1905, Chicago, Ill., U.S.—d. Jan. 28, 1936, Stateville Penitentiary, Illinois) were defended in a bench trial by famed lawyer Clarence Darrow (Darrow, Clarence), who secured them life imprisonment rather than execution.

Wealthy and intellectually brilliant (Leopold had graduated from the University of Chicago at 18, Loeb from the University of Michigan at 17), the two had committed several petty acts of theft and arson before attempting the “perfect murder”—in the kidnap of Bobbie Franks in a rented automobile on May 21, 1924, on Chicago's south side; Loeb, the more ruthless of the two, hit the boy on the head with a chisel and stuffed a gag in his mouth; the boy died within minutes. They half-buried the body in a railway culvert and, by phone and notes, demanded $10,000 in ransom from the boy's wealthy parents. The body, however, was unexpectedly found, and several clues, including the discovery of Leopold's eyeglasses at the culvert, led the police to Leopold and Loeb. They quickly confessed.

For 33 days in July–August 1924, Darrow, hired by Leopold's father, defended the two before Judge John R. Caverly, offering an eloquent appeal against capital punishment. The judge finally sentenced them each to life imprisonment for murder and 99 years for kidnapping. They were sent to Northern Illinois Penitentiary near Joliet.

In January 1936, Loeb was razor-slashed and killed by a fellow inmate, toward whom Loeb allegedly had made sadistic homosexual advances. Leopold was paroled in 1958 and worked as a hospital technician in Puerto Rico, where he married a widow in 1961. He died of a heart attack 10 years later. He wrote Life Plus 99 Years (1958).