Abdullah al Senussi, who as spy chief was one of most feared men in Libya, is wanted for questioning by the United States over the 1988 bombing over Lockerbie that killed 270 people.
He was accused of having a central role in the killing of more than 1200 inmates at Tripoli's Abu Salim prison in 1996. It was the arrest of a lawyer acting for relatives of the victims that sparked the revolt in February last year.
Both the international criminal court and France, which suspects him of involvement in a 1989 airliner bombing over Niger in which 54 French nationals died, wanted to take him into custody.
Senussi fled the rebellion that toppled Gaddafi, but was captured in Mauritania and extradited to Libya in September. His daughter, Sarah, called for him to have a fair trial, saying: " I haven't spoken to him in over 60 days and his lawyer hasn't been allowed in to see him.
"Human rights organisations have asked repeatedly to visit him and they have been refused also."
Ms Senussi added that she did not know whether he was receiving medical treatment.