Biography
R. Rio was secretary of the new Mexican union in the Imperial Valley cantaloupe strike. The June 1, 1928 Daily Worker, citing a May 25 report to El Heraldo de Mexico, says he was arrested after the other prisoners had been released and was then turned loose. Exact arrest and discharge days and complete duration are not given. The initial is not expanded. Source: https://www.marxists.org/history/usa/pubs/dailyworker/1928/1928-ny/v05-n129-NY-jun-01-1928-DW-LOC.pdf#page=4
