Biography
Pietro Nigra was a miner from Chicago, Illinois. Pietro Nigra was convicted at the mass IWW trial in Chicago and sentenced to eighteen months in prison. He served in the Cook County Jail and Leavenworth Penitentiary from October 1917 to April 1918, from March 1919 to April 1919 and from April 1921 to May 19, 1922.
The March1922 official report lists Pietro Nigra in List1 of convicted prisoners or parolees. The government entry reports Conspiracy in violating the espionage act, ete. a sentence of February 28, 1919, 18 months, Leavenworth.. Imposed terms, projected term-expiration dates, parole eligibility and intervals on bond are different measures; none is entered as a complete actual custody total. This attributed government entry is retained alongside the independently established individual chronology. [PDF14]
Government Prosecutions under the Espionage Act, Senate Document159 (March1922), PDF page 14.