Biography
Jack Law was a machinist from Boston, Pennsylvania. Jack Law was convicted at the mass IWW trial in Chicago, sentenced to five years in prison and fined $30,000. He served in Leavenworth Penitentiary from September 9, 1918, to September 28, 1919, and from April 25, 1921, to December 25, 1921. Law was convicted even though he had left the IWW two years before the indictments.
The March 1920 One Big Union Monthly prisoner roster provides a contemporaneous procedural account. The roster reports that he was out on $10,000 bond pending appeal in the Chicago IWW prosecution. Source: https://www.marxists.org/history/usa/pubs/one-big-union-monthly/v02n03-mar-1920_One%20Big%20Union.pdf#page=14