The former Mauritanian prisoner in Guantanamo, Mohamedou Ould Slahi, filed a lawsuit against the Canadian government, accusing him of providing false information about him to the United States, which led to his 14-year imprisonment in that detention.

Ould Slahi and his lawyers believe that the "wrong information" provided by the Canadian authorities led to his arrest in the US military prison, where he said that he was subjected to "unspeakable torture and ill-treatment", including beatings, sleep deprivation, sexual assault, death threats and others.

According to the sources, Ould Slahi believes that the false intelligence information Canada provided to the American intelligence caused him to suffer in Jordanian and American prisons in the Bakram and Guantanamo bases for a decade and a half and tarnish his reputation.

The ex-detainee is claiming $35 million Canadian dollars in damages.

Ould Slahi accuses the Canadian authorities of having "tacitly tolerated" the torture he was subjected to, and even "used" information derived from confessions extracted from him under torture.

Mohamedou Ould Slahi wrote his story in a book that became a bestseller around the world and was transformed by Hollywood into a film that accurately depicts the harsh conditions of detention at the American base.

The man was held at Guantanamo without trial between 2002 and 2016.

He was arrested in 2001 in Mauritania and imprisoned respectively in Jordan and Afghanistan before being transferred to Guantanamo, in what he described in his book as a "world tour of torture and humiliation."

The US authorities accused him of belonging to al-Qaeda, and of being a member of the "Hamburg cell" (Germany) linked to the September 11 attacks.