A Brazilian high-court judge cleared federal prosecutors Thursday to investigate the current governor and a former governor of Rio de Janeiro state, as a probe into alleged corruption surrounding state oil company Petróleo Brasileiro SA widened. Current Gov. Luiz Fernando Pezão and his predecessor, Sérgio Cabral, will be investigated for money laundering and public-administration violations. Federal prosecutors suspect them of soliciting and receiving 30 million Brazilian reais ($9.5 million) in 2010 from construction firms contracted by Petrobras to build a large refinery in Rio state. Petrobras’s former refining director, Paulo Roberto Costa, detailed the alleged payments last year as part of a cooperation agreement with prosecutors. But because of special rules guiding the prosecution of public officials, Brazil’s vice attorney general had to request authorization […]