Paraguay's archive of terror

The nightmare of Ana de Mancuello's life began on 25 November 1974.

That was the day plainclothes police officers invaded her Asuncion home and took away her husband Mario and her 20-year-old son Hugo.

Unknown to her, her oldest son Jose, 22, an engineering student in Argentina, was also in an Asuncion prison with his pregnant wife and infant daughter, the three having been arrested days before.

"[The police] told me they were guerrillas," recalls Mrs Mancuello, now 70. "It was nothing but an invention of the police."

After nine months of abuse, Hugo and his father were released, the father's health broken forever. But Ana de Mancuello would never see Jose. again.