"We will find the murderers," President Volodymyr Zelensky said late on Monday. In the footage, one of the shooters - believed to be a Russian soldier - is heard saying "die" and using an expletive after the prisoner of war (POW) is shot dead. The Russian soldier filmed carrying out the attack in the town of Severodonetsk was identified as a member of a unit belonging to Chechen leader Ramzan Kadyrov