Russian Sgt. Vadim Shishimarin waits for the start of a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The 21 year old soldier facing the first war crimes trial since the start of the war in Ukraine plead guilty on May 18 to killing an unarmed civilian. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin listens to his translator during a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The 21 year old soldier facing the first war crimes trial since the start of the war in Ukraine plead guilty on May 18 to killing an unarmed civilian. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin listens to his translator at a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The 21 year old soldier facing the first war crimes trial since the start of the war in Ukraine plead guilty on May 18 to killing an unarmed civilian. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin stands after a Ukrainian court sentenced him to life in prison in Kyiv, Ukraine, Monday, May 23, 2022. The court sentenced the 21-year-old soldier for killing a Ukrainian civilian, in the first war crimes trial held since Russia's invasion. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin listens to his translator during a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The court sentenced the 21-year-old soldier to life in prison on Monday for killing a Ukrainian civilian, in the first war crimes trial held since Russia's invasion. (AP Photo/Natacha Pisarenko), APTOPIX

Russian sergeant Vadim Shishimarin (R) stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (R) stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (C) stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (R) stands in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. "The court has found that (Vadim) Shishimarin is guilty and sentences him to life imprisonment," judge Sergiy Agafonov said. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin sits in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. "The court has found that (Vadim) Shishimarin is guilty and sentences him to life imprisonment," judge Sergiy Agafonov said. - A Kyiv court ruled that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (L) listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (C) listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Russian sergeant Vadim Shishimarin (C) listens court sentence in the defendant's box on the last day of his trial on charges of war crimes for having killed a civilian, at a courthouse in Kyiv on May 23, 2022. - A Kyiv court ruled on May 23, 2023 that a 21-year-old Russian soldier who killed a civilian was guilty of war crimes and handed him a life sentence, in the first verdict against Moscow's forces since their invasion. Shishimarin, a Russian sergeant, admitted early in court to killing 62-year-old Oleksandr Shelipov in the first days of the Kremlin's offensive in north-east Ukraine. (Photo by Sergei SUPINSKY / AFP)

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Nicolas Cleuet / Le Pictorium - UKR - War Ukraine - Kiev - Prosecution of a young Russian soldier for war crimes - 19/5/2022 - Ukraine / Kyiv / Kyiv - Second day of the trial of Sergeant Vadim Chicimarin, 21, for the murder of 62-year-old civilian Oleksander Chelipov, in the region of Soumy on the fourth day of the invasion of Ukraine. 19 05 2022.

Russian Sgt. Vadim Shishimarin waits for the start of a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin attends a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The 21 year old soldier facing the first war crimes trial since the start of the war in Ukraine plead guilty on May 18 to killing an unarmed civilian. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin attends a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The court sentenced the 21-year-old soldier to life in prison on Monday for killing a Ukrainian civilian, in the first war crimes trial held since Russia's invasion. (AP Photo/Natacha Pisarenko)

Russian Sgt. Vadim Shishimarin attends a court hearing in Kyiv, Ukraine, Monday, May 23, 2022. The court sentenced the 21-year-old soldier to life in prison on Monday for killing a Ukrainian civilian, in the first war crimes trial held since Russia's invasion. (AP Photo/Natacha Pisarenko)