Jair Bolsonaro has been detained after authorities concluded he posed a definite escape threat while under house arrest.
The ex-president was found guilty of plotting a government overthrow in September and sentenced more than a 27-year term in incarceration, but he continued under house arrest pending legal challenges.
Brazilian Supreme Court Justice Alexandre de Moraes said the decision to arrest the elderly politician was a preventative measure after fresh information came to light.
This encompassed seeking to disable his electronic bracelet and a invitation to a public vigil that could "allow for a chance to flee".
In a paperwork permitting the arrest, Justice Moraes said intelligence from the centre monitoring the former president's confinement suggested the former leader's plan to remove the surveillance device to guarantee victory in his escape.
This, it said, would be assisted by the chaos caused by the protest called by his child.
His offspring, his son Flávio, who holds office as a legislator, called for a meeting of his followers near Bolsonaro's home to take place on Saturday night.
Flávio Bolsonaro wrote on online platforms on the previous day: Will you battle for your country, or observe everything from your phone there on your sofa? I call on you to struggle with us."
He said the demonstration would be so supporters could "pray for his well-being and for the return of democracy in our country."
Part of the magistrate's ruling was the chance of his transfer to diplomatic missions near the residence, considering that the probes revealed a history of planning to request asylum through a embassy office", a declaration said.
The legal document emphasizes that the United States embassy in the federal district, Brazil's capital, is located around 8 miles from the former president's residence.
Bolsonaro's legal woes have drawn the ire of fellow populist conservative US President Trump, causing him to impose a 50% tariff on Brazilian product imports.
He is being kept in a Federal Police station in the capital and will experience a imprisonment assessment on the next day.
It was only on Friday that the his legal team asked the Supreme Court to permit him to fulfill his full incarceration period under house arrest, with tracking devices.
They also requested that the former president be permitted to leave his home for medical treatment, saying he needed frequent medical attention for lung conditions and other illnesses.
He was convicted of orchestrating a scheme aimed at retaining his authority after he was defeated in the 2022 election to his political opponent, Luiz Inácio Lula da Silva.
High Court judges said that he knew of a plot which included plans to assassinate his opponent and his vice-presidential running mate, Alckmin, and to imprison and murder Justice Moraes - the High Court judge who has been overseeing the former president's case.
The conspiracy was prevented because it couldn't obtain the endorsement of the military leaders. The current president was inaugurated without problem on January 1st, 2023.
But a following week, on the eighth of January, many Bolsonaro supporters invaded and destroyed public facilities in the federal district, the capital city.
The law enforcement took action and around fifteen hundred individuals were detained.
The magistrates found that the demonstrators had been incited by him whose scheme, they said, was for the country's army to take action, bring back stability and reinstate his authority.
At the time, the legal team called the over 27-year sentence extremely harsh.
He was also barred from campaigning for office until 2060 - a decade minus two years after the conclusion of his imprisonment.
The one-time head of state called the legal proceedings a political persecution and said it was designed to prevent him competing in the next presidential race.
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