It's been more than 40 days since coal-ash from a Duke Energy power plant contaminated 70 miles of North Carolina's Dan River. Public health officials have warned against drinking the water or eating fish caught in the Dan. But the failure to clean up so far is only part of the story. A federal grand jury has been convened for a criminal investigation, with at least 23 subpoenas issued. There are claims of a "sweetheart deal" between the company and regulators appointed by the Governor, a former Duke Energy employee. Jeff Tiberii is Greensboro Bureau chief for WUNC, the NPR affiliate in Chapel Hill.