Biography
The April 15 report names these workers as arrested during the police raid on Young Pioneer and Communist Party offices after the Saturday protest for Harry Eisman’s release. It says Mates and others were severely beaten. Exact custody endpoints, individual statutory counts and completed duration are unreported. Daily Worker, April 15, 1930, original PDF page 3. Source: https://www.marxists.org/history/usa/pubs/dailyworker/1930/v06-n345-NY-apr-15-1930-DW-LOC.pdf#page=3
