 In 1964, the FBI's COINTELPRO program began attempts to infiltrate and disrupt civil rights groups.As 20th-century Supreme Court rulings extended federal enforcement of citizens' civil rights, the government revived the Enforcement Acts and the Klan Act from Reconstruction days.Federal prosecutors used these laws as the basis for investigations and indictments in the 1964 murders of Chaney, Goodman, and Schwerner; and the 1965 murder of Viola Liuzzo.