Prigozhin's Wagner terrorist group executes captured Ukrainian prisoners of war - per official order from Ministry of Defence
After recruiting them, Prigozhin's terrorist group hunts down the convicts who survive their deployments in the Wagner penal units.
According to Wagner PMC commander Andrei Medvedev, Wagner's own security service is called "Myod," translates to "Honey," and is comprised of former and current FSB officers.
It is Wagner PMC's security service Myod that hunts down and executes convicts who manage to miraculously survive the war and escape back to Russia. Myod is also the entity that is primarily tasked with executing convicts on the front who refuse to follow orders.
Medvedev's contract with Wagner PMC started on July 6th for 4 months. However, when he survived the term and intended to return to Russia as a free man, he was told his term will be extended by 6 months, then 8 months. When he refused, he was thrown in the 'hole' at his own unit.