Fred H. Moore (1882–1933)[1] was a socialist lawyer and the defense attorney of the controversial Sacco and Vanzetti case.

The uncompromising anarchists Sacco and Vanzetti, Moore realized, had the potential to spark an international cause célèbre.

While preparing his courtroom case, Moore began alerting labor and socialist organizations in America and Europe, thus setting the stage for the worldwide attention the two men would later draw.

Thayer routinely denied Moore's motions and lectured the California-based lawyer on how law was conducted in Massachusetts.

Eugene Lyons, a strong socialist who later went on to be a senior editor of Reader's Digest described Moore as an idealist with "no conscience once he decided his client was innocent.

Lyons worked with Moore on publicity to stimulate the sympathies of those who were unaware of the two Italian anarchists' trials.

[5] Moore's summation before the jury likewise failed to mention other factors that might have acquitted the men, including a cap found at the scene that did not fit Sacco and anomalies concerning Vanzetti's gun.

For the next three years, he dug up evidence in his clients' defense while simultaneously publicizing the case through worldwide labor channels.

[6] Boston corporate attorney William Thompson, who waged a spirited defense of the men following Moore's dismissal, never doubted the innocence of Sacco and Vanzetti.