Paulo Roberto Costa, a former downstream director of Brazilian oil company Petrobras who died last Saturday after a battle with cancer, played a pivotal role in the infamous Car Wash corruption scandal and unwittingly helped reshape an energy sector that had become riddled with corruption.

Costa was born in the Brazilian state of Parana which, by coincidence, was also home to Sergio Moro, a federal judge who oversaw the investigation, presiding over many of its prosecutions and trials.