The independent report, which was commissioned by the Bahraini government, outlined how al-Khawaja had been hit, kicked, thrown down stairs, had his jaw broken, and sexually abused while in prison.
Al-Khawaja has previously worked for Amnesty International which has since called on the Danish government to push for his release.
“We now have it in black and white that the Danish citizen Abdulhadi al-Khawaja has been subjected to torture, sexual abuse, violence and degrading treatment,” Lars Normann Jørgensen, the general secretary of Amnesty International Denmark, told Berlingske newspaper.
“The Danish government needs to use every diplomatic opportunity to overturn al-Khawaja’s life sentence and have him unconditionally released,” Jørgensen said. “He is the definition of a political prisoner who has been tortured and sentenced simply because of his peaceful fight for reforms and human rights.”