A federal grand jury indicted W. R. Grace and Company and seven top executives on February 5, 2005, for its operations of a vermiculite mine in Libby, Montana. The indictment accused Grace of wire fraud, knowing endangerment of residents by concealing air monitoring results, obstruction of justice by interfering with an Environmental Protection Agency (EPA) investigation, violation of the Clean Air Act, providing asbestos materials to schools and local residents, and conspiracy to release asbestos and cover up health problems from asbestos contamination. The Department of Justice said 1,200 residents had developed asbestos-related diseases and some had died, and there could be many more injuries and deaths.