The burning Cuyahoga River in 1969 had led to a national outcry. In December 1970 a federal grand jury investigation led by U.S. Attorney Robert W. Jones began, of water pollution allegedly being caused by about 12 companies in northeastern Ohio. It was the first grand jury investigation of water pollution in the area. The attorney general of the United States, John N. Mitchell, held a press conference on December 18, 1970, referencing new pollution control litigation, with particular reference to work with the new Environmental Protection Agency, and announcing the filing of a lawsuit that morning against the Jones and Laughlin Steel Corporation for discharging substantial quantities of cyanide into the Cuyahoga River near Cleveland. Jones filed the misdemeanor charges in District Court, alleging violations of the 1899 Rivers and Harbors Act.