Why was the Sacco and Vanzetti case controversial

Sacco and Vanzetti, in full Nicola Sacco and Bartolomeo Vanzetti, defendants in a controversial murder trial in Massachusetts, U. S. (1921-27), that resulted in their executions.

The trial resulted from the murders in South Braintree, Massachusetts, on April 15, 1920, of F. A. Parmenter, paymaster of a shoe factory, and Alessandro Berardelli, the guard accompanying him, in order to secure the payroll that they were carrying. Socialists and radicals protested the men's innocence. Many people felt that the trial had been less than fair and that the defendants had been convicted for their radical anarchist beliefs rather than for the crime for which they had been tried.