The former personal lawyer of Brazilian President Luiz Inácio Lula da Silva has joined the ranks of the country’s Supreme Court amid criticism that their relationship poses a conflict of interest.

He helped Lula overturn a graft conviction stemming from Brazil’s sprawling “Car Wash” corruption investigation, getting him freed after 580 days of incarceration. The Supreme Court annulled all convictions of Lula, and ruled in 2021 that the judge overseeing the case had been biased. That allowed Lula to run successfuly for his third, non-consecutive presidential term.

In July, senators examining Zanin’s appointment questioned the lawyer about his ability to remain nonpartisan. A large majority of senators went on to vote in favor of his nomination, making the 47-year-old the youngest justice on the 11-member court.

Lula, who in March called Zanin “his friend” on radio BandNews FM, pedalled back in a later interview. “He was not a friend, he was my lawyer,” Lula told Record TV in July after Zanin’s appointment had been approved by the Senate. “He is an extremely capable person … He is very studious, he is very competent, he is very dedicated and he is very serious. This is the reason why he was chosen.”