May Day Riot occurs.

Some 1,500 workers, many of them members of the Lettish Socialist Workmen’s Society, chanting anti-American and anti-capitalist slogan, attempt to march in the city’s annual parade and are set upon by police and bystanders near today’s 67 Humboldt Avenue. In the violence that follows, scores are injured, two police officers are shot and one is stabbed. Some 114 people are arrested and tried in Roxbury District Court two weeks later.*