ZAPORIZHZHIA, Ukraine—Hooded and handcuffed, Ihor Murashov , director general of Europe’s largest nuclear plant, was on the stone floor of a basement prison, accused by masked men of betraying Russia.
He could hear the captors interrogating his chauffeur.
The 46-year-old Mr. Murashov, who had led the occupied Zaporizhzhia atomic energy station for seven months, was ordered by gun-brandishing guards to face the lens of a video camera.
“What you say now will determine your fate,” he recalled one telling him.