Mohammed al-Qahtani has been held at Guantanamo for 18 years but never charged.
Naval Station Guantanamo Bay
John Bruce Jessen told a military court that the techniques used against detainees had been shown to have no lasting effects.
About 780 prisoners have been held at the facility since it opened, but only 40 remain now.
The testimony in Guantanamo is an important milestone in the Sept. 11 war crimes proceedings.
A jury convicted Capt. Nettleton of obstruction of justice, concealing material facts, and making false statements.
Nettleton was removed as commander of Guantanamo Bay Naval Base following the death of a civilian worker in 2015.
The third day of testimony in the criminal trial of a former Jacksonville-based Navy captain is a sea of brass.
Opening statements in the trial of the former commander of Guantanamo Naval Base got off to a dramatic start Tuesday.
The 192nd Military Police Battalion spent the past year training for the deployment.
Prisoner transfers to the U.S. will remain barred.