Author: Olha Modina / RFE/RL

In 2018, the Russia-backed forces controlling part of Ukraine’s Donetsk region sentenced Valeriy Matyushenko to 10 years in prison for “espionage” after holding him in detention for 10 months and conducting what they called a trial. In the years before Russia’s full-scale invasion of Ukraine, Mr. Matyushenko was allowed to make two local telephone calls...