Jair Bolsonaro has been detained after authorities determined he posed a concrete flight risk while under domestic detention.
The one-time leader was found guilty of plotting a government overthrow in September and handed more than over two decades in jail, but he was staying under home detention pending appeals.
High Court Judge Alexandre de Moraes said the action to imprison the 70-year-old politician was a preventative measure after fresh information emerged.
This encompassed attempting to break his ankle monitor and a invitation to a public vigil that could facilitate a chance to flee".
Judicial Records Show Escape Risks
In a paperwork permitting the detention, the judge said intelligence from the centre monitoring the former president's confinement suggested the ex-president's "intention to break the electronic ankle bracelet to secure accomplishment in his flight.
This, it said, would be assisted by the disorder caused by the protest called by his child.
His son, Flávio, who serves as a senator, called for a assembly of his supporters near his father's house to take place on Saturday night.
The senator wrote on social media on Friday: Do you plan to struggle for your homeland, or observe everything from your smartphone there on your settee? I urge you to fight with us."
He said the demonstration would be so supporters could seek divine intervention for his well-being and for the return of democracy in our nation."
Foreign Shelter Risks
Part of Justice Moraes's decision was the potential of his "relocation to foreign missions near the home, considering that the probes revealed a history of arranging to ask for protection through a diplomatic representation", a announcement said.
The court filing underscores that the US embassy in the national capital, Brasilia, is located around 13km from Bolsonaro's home.
Worldwide Consequences
His judicial problems have generated frustration from fellow right-wing populist US President Trump, causing him to implement a fifty percent tax on imports of Brazilian goods.
He is being kept in a federal law enforcement building in Brazil's capital city and will experience a custody hearing on Sunday.
Latest Court Petitions
It was only on Friday that the former president's lawyers asked the High Court to authorize him to complete his entire prison term under house arrest, with electronic monitoring.
They also petitioned that Bolsonaro be allowed to exit his dwelling for medical care, saying he required ongoing care for respiratory ailments and other ailments.
Details of Guilty Verdict
Bolsonaro was convicted of orchestrating a plot aimed at retaining his authority after he lost the 2022 election to his ideological adversary, President Lula.
Supreme Court justices said that he had knowledge of a scheme which included plans to kill Lula and his VP candidate, Geraldo Alckmin, and to detain and kill Justice Moraes - the Supreme Court justice who has been managing his judicial proceedings.
The scheme was stopped because it failed to get the support of the army and air force commanders. His successor was sworn in without issue on 1 January 2023.
But a following week, on the eighth of January, thousands of his backers invaded and destroyed government buildings in the federal district, Brasília.
The police took action and around fifteen hundred individuals were arrested.
The justices found that the protesters had been provoked by him whose strategy, they said, was for the national armed forces to intervene, bring back stability and bring him back to power.
At the period, his attorneys called the 27 years and three months sentence "absurdly excessive.
He was also banned from running for public office until twenty-sixty - eight years later after the end of his sentence.
The one-time head of state called the court case a targeted investigation" and said it was intended to stop him participating in the 2026 national vote.
