Karim Wade is believed to have amassed a personal fortune of more than $1.3 billion, and a special prosecutor has been investigating the possible embezzlement of state funds. Lawyer Cire Cledor Ly said that Wade was brought Monday to a police station where he was being interrogated.
His father, Abdoulaye Wade, left office last year after losing the presidential runoff election in a landslide.
Karim Wade has long been the subject of accusations of embezzlement, especially after his father appointed him to head a "super ministry," giving him control over the key sectors of the Senegalese economy.
His lawyer has said that his client is being unjustly accused.
