On July 8, 1977, 134 agents of the Federal Bureau of Investigation simultaneously stormed the Church of Scientology's offices in Washington, D.C. and Los Angeles, seizing nearly 50,000 documents and other evidence. The raids were in response to the federal government's discovery that the Church of Scientology had been carrying out a secret and highly illegal "dirty tricks" campaign against government agencies, individuals, and institutions deemed to be enemies of Scientology. A year later, on August 15, 1978, Mary Sue Hubbard was indicted by a grand jury, accused of masterminding a conspiracy against the government in her capacity as head of the Church's Guardian's Office.