STF Weighs 'Dosimetria' Law as Alternative to Overturning Bolsonaro's Conviction

A moderate faction within Brazil’s Supreme Court (STF) is quietly positioning a controversial, newly enacted sentencing law as a political release valve for the country's highly polarized judiciary. According to a report by TV Globo on October 11, 2026, several justices are advocating to rule on the constitutionality of the Lei da Dosimetria (Law 15,402/2026) shortly after the upcoming municipal runoff elections. The move is seen as a strategic alternative to a full criminal revision that would completely overturn the coup conviction of former right-wing President Jair Bolsonaro.

The law in question, passed by Congress earlier this year over a veto by leftist President Luiz Inácio Lula da Silva, alters the Penal Code to reduce sentences and ease parole progression for those convicted of crimes against the democratic state. This directly covers the hundreds of rioters convicted for the January 8, 2023, attacks on government headquarters in Brasília, as well as Bolsonaro himself. Bolsonaro was sentenced to 27 years and three months in prison for his role in an attempted coup to block the 2022 election results.

For the stf brazil court, finding a middle ground is highly desirable to de-escalate years of institutional friction. Fully exonerating Bolsonaro through a criminal revision would trigger immense backlash from the ruling left and the court's own progressive wing, which has spent years prosecuting anti-democratic acts. Conversely, keeping the former president behind bars for nearly three decades risks fueling the conservative opposition's narrative of judicial persecution.

Under calculations made by Bolsonaro's defense team, applying the Lei da Dosimetria could slash his 27-year sentence down to 19 years and seven months. More importantly, because the law eases regime progression, the former president could transition to semi-open liberty—allowing him to leave prison during the day—after serving just over three years. Having already served six months of his sentence, this legal mechanism could see Bolsonaro out of a cell in less than three years.

The Electoral Lens and Judicial Timing

The timing of this judicial maneuver is deeply tied to Brazil's electoral calendar. Justice Nunes Marques, who is overseeing Bolsonaro's criminal revision requests, has indicated to peers that any major ruling must wait until after the October municipal runoffs to avoid directly interfering with the elections. This delay is intended to shield the court from accusations of partisan meddling during a sensitive voting window.

Legal experts and court insiders believe there is already a working majority on the STF bench to uphold the constitutionality of the law, potentially with minor adjustments. Even Prosecutor General Paulo Gonet has signaled his support for the law's validity. If the court upholds the law, it would bypass the need to review the core evidence of Bolsonaro's conviction, offering a purely technical adjustment to his sentence that satisfies moderate jurists and pacifies the opposition.

What it touches

While this development is primarily political, any resolution to the ongoing brazil stf crisis directly impacts sovereign risk perceptions. A reduction of Bolsonaro's sentence via a legislated framework, rather than a dramatic judicial reversal, could lower the political temperature in Brasília, benefiting large state-controlled entities and domestic equities sensitive to institutional stability, such as Petrobras (PBR) and the broader iShares MSCI Brazil ETF (EWZ).