WASHINGTON (Reuters) – Former U.S. Marine Trevor Reed described his experience in a Russian psychiatric facility in an interview broadcast on Friday, detailing squalid conditions amid severely mentally ill inmates. Reed, detained in Russia in 2019, was freed on April 28 in a prisoner swap that took place amid the most tense bilateral relations in decades over the war in Ukraine. In excerpts from an interview with CNN, Reed said he was held with seven other prisoners in a cell at a psychiatric treatment facility. The Russian Embassy in Washington had no immediate comment on Reed’s remarks. Most…