In April 2023 116 Russian military personnel were convicted of murder - 900% higher than the previous year.
The same time this year, Russian media outlet Vertska reported that 190 former convicts were prosecuted again in criminal cases - 20 of whom were for murder or attempted murder.
One of those included an ex-Wagner prisoner who was sentenced to 22 years after murdering an elderly woman after his release.
The UK's Ministry of Defence puts this high number of murders by serving and veteran Russian soldiers down to enduring war-related chronic poor mental health issues.
It says post-traumatic stress disorder (PTSD) and battlefield desensitisation to violence are also likely contributors.