Joseph's opposition to the State had not gone unnoticed and she was a defendant at the 1956 Treason Trial. Justice Rumpff stated, "On all the evidence presented to this court and on our findings of fact, it is impossible for this court to come to the conclusion that the African National Congress has acquired or adopted a policy to overthrow the state by violence, that is, in the sense that the masses had to be prepared or conditioned to commit direct acts of violence against the state."