Has Russia shown any indication, before the war, that it would court-martial its soldiers if they commit war crimes?

There is a number of reports of claims of Russian soldiers committing war crimes during the prosecution of Russia's 2022 war of aggression on Ukraine.

Usually armies prevent their own soldiers from committing war crimes by having clear rules of engagement which forbid them. Such prohibitions are only credible if they are enforced through some sort of military adjudications.

Has Russia made it clear that its soldiers committing war crimes in Ukraine would be punished for them in some way? Or has it stayed silent on the subject, or even indicated that it would sanction, or even order, committing war crimes under some circumstances?