Bolsonaro has been taken into custody after authorities concluded he posed a concrete flight risk while under house arrest.
The ex-president was convicted of planning a military coup in last fall and handed more than over two decades in prison, but he continued under home detention pending appeals.
High Court Judge Justice Moraes said the action to imprison the elderly politician was a preventative measure after "new facts" came to light.
This involved seeking to disable his tracking device and a call for a supporters' gathering that could facilitate a potential flight.
Legal Document Reveals Escape Concerns
In a filing authorising the detention, the magistrate said data from the centre monitoring his home detention suggested the former leader's plan to remove the electronic ankle bracelet to secure accomplishment in his getaway".
This, it said, would be "facilitated by the chaos caused by the protest called by his child.
His child, Flávio Bolsonaro, who serves as a senator, called for a assembly of his followers near Bolsonaro's home to take place on Saturday evening.
Flávio Bolsonaro wrote on online platforms on Friday: "Are you going to fight for your nation, or see it all from your phone there on your couch? I urge you to fight with us."
He said the vigil would be so backers could seek divine intervention for his health and for the reestablishment of democratic governance in our country."
Foreign Shelter Risks
Part of the magistrate's determination was the potential of Bolsonaro's transfer to diplomatic missions near the home, considering that the inquiries revealed a history of organizing to ask for protection through a diplomatic representation", a statement said.
The judicial paperwork emphasizes that the United States embassy in the federal district, Brazil's capital, is situated around 13km from Bolsonaro's home.
International Reactions
Bolsonaro's legal woes have provoked anger from fellow right-wing populist American leader Donald Trump, causing him to implement a fifty percent tax on goods coming from Brazil.
He is being detained in a federal law enforcement building in Brazil's capital city and will experience a imprisonment assessment on Sunday.
Recent Legal Requests
It was only on last Friday that the ex-leader's attorneys asked the High Court to allow him to fulfill his full incarceration period under home confinement, with tracking devices.
They also requested that the former president be permitted to depart his residence for medical treatment, saying he needed regular treatment for respiratory ailments and other ailments.
Background on Conviction
He was determined responsible of leading a plot aimed at retaining his authority after he was defeated in the 2022 election to his ideological adversary, President Lula.
Supreme Court justices said that he had knowledge of a plan which included plans to kill the current president and his vice-presidential running mate, Geraldo Alckmin, and to imprison and murder Alexandre de Moraes - the Supreme Court justice who has been managing Bolsonaro's trial.
The conspiracy was prevented because it failed to get the backing of the armed forces officials. Lula was inaugurated without incident on 1 January 2023.
But a following week, on the eighth of January, many his backers stormed and vandalised official structures in the federal district, Brasília.
The police intervened and around approximately 1,500 persons were arrested.
The judges found that the protesters had been incited by the former president whose strategy, they said, was for the country's army to take action, reestablish control and bring him back to power.
At the time, his attorneys called the 27 years and three months sentence unreasonably severe".
He was also prohibited from running for public office until twenty-sixty - eight years after the completion of his term.
The former president called the trial a political persecution and said it was aimed at blocking him competing in the next presidential race.
