Mauritania's ex-president Mohamed Ould Abdel Aziz goes on trial on graft charges on Wednesday in an exceptional prosecution of a former African head of state.
Abdel Aziz, a 66-year-old former general, faces charges of having built up an illicit fortune during his 11 years at the helm.
He was arrested on the eve of the trial, said his lawyer Cire Cledor Ly.
The police "came to look for him at home" in the capital Nouakchott, armed with a warrant, they said.
About 10 other figures from his former regime, also facing charges of corruption, money laundering and illicit enrichment, were arrested too, a security source said.
After coming to power in a coup, Abdel Aziz stepped down in 2019 after two presidential terms in which he defused a jihadist insurgency threatening the conservative West African state.
He was succeeded by his former right-hand man, Mohamed Ould Ghazouani -- like him an erstwhile general who was an architect of the anti-jihadist campaign.
It was the first transfer of power between elected leaders in the history of a country marked by military coups and upheaval.
Ghazouani, in December 2019, described his former boss as "my brother, my friend".
But within months, such fine language became consigned to the past.
In 2020, a parliamentary investigation was opened into financial dealings under Abdel Aziz's presidency.
It delved into oil revenues, the sale of state assets, the winding up of a public company in charge of food supplies and the activities of a Chinese fishing company.
Abdel Aziz and 11 other figures from his former regime were then charged. The defendants include one of his sons-in-law, two former prime ministers and several ex-ministers and businessmen.
Abdel Aziz, the son of a trader, is suspected of creaming off money from state contracts or the sale of real estate, amassing a fortune equivalent to more than $72 million.
- Rare prosecution -
The ex-president has refused to answer questions about the source of his wealth.
He describes himself as the victim of score-settling and argues he has immunity from prosecution under the constitution.
"He completely rejects the accusations against him," one of his lawyers, Taleb Khayar Ould Med Mouloud, said.
"Lots of people have grounds for hating him, including the Muslim Brothers, which he threw out of the country."
On Saturday, his lawyer Cire Cledor Ly said Abdel Aziz had had to endure "a cascade of violations of his rights at every level of the case".
His defence had still not had access to the full case file just days before the trial was due to start, he charged.
"In reality, what they want is to humiliate him, to break him," he said.
Abdel Aziz wrote in a note released by lawyers on Tuesday that he will appear in court "to defend his honour" against "extravagant and fallacious accusations".
Prosecutions of former heads of state are rare in the world, but especially so in Africa.
Such cases, to the extent that they occur, usually happen years after a former leader has been toppled, and on charges related to violence rather than corruption.
Abdel Aziz, known for his combative stance, has warned he could spill the beans during the trial, which may last weeks or even months.
"If push comes to shove, I will talk," he told the French magazine Jeune Afrique last October.
Many ordinary Mauritanians interviewed by AFP said they were more worried about inflation rather than a case that, in their view, was an affair within the ruling elite.
"It's a settling of scores between two men who have done a lot of things together," said Issa Ahmed Ahmed Mouloud, a 23-year-old student.
But Moussa Samba Sy, editor of the Quotidien de Nouakchott, suggested the case could have widespread resonance.
"People are focussed on their daily problems and think that this is a dispute between leaders.
"But many think that this is the chance to turn the page once and for all on mismanagement," he said.