Guardian: Federal authorities have launched a criminal investigation into a massive coal ash spill into a North Carolina river, demanding that Duke Energy and state regulators hand over reams of documents related to the accident that left a waterway polluted with tons of toxic sludge.
The US attorneys office in Raleigh issued grand jury subpoenas seeking records from Duke and the North Carolina Department of Environment and Natural Resources (DENR). The subpoenas seek emails, memos and reports related...