Answer
Viktor Medvedchuk, a pro-Russian Ukrainian politician, was involved in a 2022 prisoner exchange with Ukrainian prisoners of war who had been held during the Siege of Mariupol. Kyiv released several captured Russian personnel in exchange for Medvedchuk, who was accused of treason. The swap facilitated by Saudi Arabia and Turkey took place in September 2022, contributing to the ongoing efforts for humanitarian resolution amidst the conflict.