Brazilian federal prosecutors say they have opened an investigation into alleged environmental crimes by Roberto Carvalho, chief executive of BHP Billiton co-owned company Samarco Minerao SA, over a deadly damburst last year.
Brazilian federal prosecutors say they have opened an investigation into alleged environmental crimes by Roberto Carvalho, chief executive of BHP Billiton co-owned company Samarco Minerao SA, over a deadly damburst last year.