Lula's defense asked the STF, by habeas corpus, to declare Moro biased (partial) to try the triplex case. The trial in the Second Panel began in 2018 and was concluded on March 23, 2021, when Cármen Lúcia changed her vote and formed a 3-to-2 majority for the bias ruling. On March 8, 2021, Fachin had declared the HC moot upon recognizing the lack of jurisdiction of Curitiba; the full court (Plenary), on June 23, 2021, upheld the Panel's decision by 7 to 4. On June 24, 2021, Gilmar Mendes extended the bias ruling to two more criminal cases. The bias was recognized in a habeas corpus, and not in a conviction or an acquittal on the merits; the dissenting votes questioned the procedural route and the lawfulness of the conversations used.
Evidence
According to the STF, the Second Panel recognized by majority, in HC 164.493, Moro's partiality in Lula's conviction in the triplex case; Ricardo Lewandowski and Cármen Lúcia (who adjusted her vote) followed Gilmar Mendes's dissent, while Edson Fachin (rapporteur) and Nunes Marques voted against.
Judicial or administrative decisionProven in a document
Source: 2ª Turma reconhece parcialidade de ex-juiz Sérgio Moro na condenação de Lula no caso Triplex — Supreme Federal Court, Mar. 23, 2021 · body of the news item · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
Limitations: The STF news item says 'by majority' without stating the numerical tally; the 3 to 2 follows from adding up the votes described and is confirmed by Conjur.
Conjur reports a majority of three votes (Cármen Lúcia, Gilmar Mendes and Ricardo Lewandowski) against two (Edson Fachin and Nunes Marques) in the Second Panel, with Cármen Lúcia's deciding vote on March 23, 2021 and publication of the ruling on June 4, 2021.
News reportSeveral independent sources
Source: STF publica acórdão da 2ª Turma sobre suspeição de Moro — Consultor Jurídico, June 4, 2021 · body of the article · open original ↗
News report · excerpt examined · accessed on Oct. 24, 2026
Lula's defense argued that Moro's acceptance of Jair Bolsonaro's invitation to the Ministry of Justice would indicate bias and political motivation; Cármen Lúcia cited the forced appearance for questioning without prior summons and the interception of lawyers and said her vote did not consider conversations released by the press and absent from the case file.
AccusationProven in a document
Source: 2ª Turma reconhece parcialidade de ex-juiz Sérgio Moro na condenação de Lula no caso Triplex — Supreme Federal Court, Mar. 23, 2021 · section on arguments · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
Limitations: The defense's arguments are described by the STF news item, not by the petition.
Conjur lists, among the grounds of the majority: the 'spectacularized' forced appearance of Lula for questioning, interceptions considered illegal and hasty, the release of the conversations, the maintenance of the arrest after a habeas corpus, and the content of the conviction.
News reportSingle source
Source: STF publica acórdão da 2ª Turma sobre suspeição de Moro — Consultor Jurídico, June 4, 2021 · body of the article · open original ↗
News report · excerpt examined · accessed on Oct. 24, 2026
Nunes Marques voted against the bias ruling: he found that bias should be raised in a bias challenge (exceção de suspeição), with production of evidence and adversarial proceedings, and not in a habeas corpus, and that the released conversations between Moro and the task force were obtained unlawfully and could not be accepted.
Judicial or administrative decisionProven in a document
Source: 2ª Turma reconhece parcialidade de ex-juiz Sérgio Moro na condenação de Lula no caso Triplex — Supreme Federal Court, Mar. 23, 2021 · section on arguments · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
On March 8, 2021, in declaring that the 13th Federal Court of Curitiba lacked jurisdiction, Edson Fachin declared several of Lula's habeas corpus petitions moot, among them HC 164.493 on Moro's bias; the defense appealed and the matter was decided by the Plenary.
News reportSeveral independent sources
Source: STF derruba condenações de Lula na Lava Jato — Migalhas, Apr. 15, 2021 · body of the article · open original ↗
News report · excerpt examined · accessed on Oct. 24, 2026
The STF Plenary upheld, by 7 votes to 4, on June 23, 2021, the Second Panel's finding that Moro was biased and the annulment of his decisions in the triplex case, in judging the second internal appeal (agravo regimental) by Lula's defense against Fachin's decision in HC 193.726.
Judicial or administrative decisionProven in a document
Source: STF confirma suspeição de Sergio Moro na ação do triplex do Guarujá — Supreme Federal Court, June 23, 2021 · body of the news item · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
In the Plenary, Gilmar Mendes, Nunes Marques, Alexandre de Moraes, Dias Toffoli, Ricardo Lewandowski, Rosa Weber and Cármen Lúcia voted to uphold; Edson Fachin, Luís Roberto Barroso, Marco Aurélio and Luiz Fux dissented, arguing that the Panel could not rule on bias after the rapporteur had closed the HC.
Judicial or administrative decisionProven in a document
Source: STF confirma suspeição de Sergio Moro na ação do triplex do Guarujá — Supreme Federal Court, June 23, 2021 · section on votes · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
Marco Aurélio and Luiz Fux, outvoted, stated that the bias ruling was based on unlawful evidence; Fux said the recordings of conversations between Moro and prosecutors were obtained by unlawful means.
StatementProven in a document
Source: STF confirma suspeição de Sergio Moro na ação do triplex do Guarujá — Supreme Federal Court, June 23, 2021 · section on votes · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
Conjur reports that the Plenary formed a majority for upholding the bias ruling on April 22, 2021, with the judgment suspended by a request for review by Marco Aurélio and concluded on June 23, 2021.
News reportSeveral independent sources
Source: Moro é suspeito para julgar Lula, decide STF por 7 votos a 4 — Consultor Jurídico, June 23, 2021 · body of the article · open original ↗
News report · excerpt examined · accessed on Oct. 24, 2026
Gilmar Mendes extended the finding that Moro was biased to the criminal cases on the Atibaia ranch and the Lula Institute properties, on grounds of factual and legal identity, equality and legal certainty (art. 580 of the CPP), mentioning among the common facts the forced appearance for questioning, the interceptions and the lifting of secrecy over Antonio Palocci's plea agreement during the 2018 campaign.
Judicial or administrative decisionProven in a document
Source: Ministro Gilmar Mendes estende suspeição de Moro em relação a Lula a mais duas ações penais — Supreme Federal Court, June 24, 2021 · body of the news item · open original ↗
Release (primary) · excerpt examined · accessed on Oct. 24, 2026
Limitations: The date is that of the news item (June 24, 2021); the news item does not state the number of the extension request.