Hüsamettin Uğur, a former member of Turkey’s Supreme Court of Appeals, has been isolated in a one-person cell in a Kırıkkale prison since a failed coup in July 2016.

After the coup attempt in July 2016, Turkey disbarred some 4,500 judges and prosecutors and imprisoned many of them over their alleged links to the Gülen group, which the Turkish government accuses of orchestrating the abortive putsch. The group denies any involvement.

Mr. Uğur previously came to public attention when he was reportedly beaten by four prison guards in a room without cameras.

The incident, which took place on Feb. 17, 2020, was revealed by Hüsamettin Uğur’s daughter, Nalan Dilara Uğur, on social media.

“He was summoned to a meeting with the head guard despite not having requested one. He was beaten and verbally threatened by four guards in a room without cameras,” Nalan Dilara Uğur tweeted. “When they left him alone after he collapsed on the ground, they said, ‘Only your dead body will leave here’.”