The former Taiwanese president Chen Shui-bian has been formally arrested after 11 hours of questioning by corruption investigators.
Supporters held a protest outside the courthouse where the 58-year-old was remanded in custody.
Chen, who was president for eight years until losing elections earlier this year, claims he and other members of his family are the victims of political persecution by his rivals.
A court official said Chen was suspected of involvement in the embezzlement of public funds and taking bribes, which carry a minimum sentence of five-years’ jail.
He said Chen was being held in custody because there was “enough evidence that he might try to interfere with witnesses or other suspects”.