Caracas, Venezuela: Venezuela’s opposition-run legislature opened an investigation Wednesday into UN envoy Rafael Ramirez, a former head of state oil giant PDVSA, for alleged ties to at least five corruption cases involving billions of dollars.

‘We have officially opened a probe of Rafael Ramirez’ in the National Assembly, said Accounts Auditing Committee chair Freddy Guevara, referring to graft cases at home and abroad.

Ramirez led PDVSA for almost a decade until 2014, placed there by late socialist president Hugo Chavez as one of his right-hand men. Chavez was in power from 1999-2013.

The opposition’s majority in the assembly means it is able to remove top government officials.

Among the cases is one involving a pyramid scheme that has already seen one conviction in the United States. Others involve money laundering allegations being probed by authorities in Andorra, Spain and Panama.

The investigation will also include Ramirez relatives Diego Salazar Carreno and Baldo Sanso, the UN envoy’s cousin and brother-in-law.