His death was surrounded with mystery as, while official records state that he was killed by Polish partisans, it is believed that Kaminski was executed by the SS. The reasons are thought to be his unit's war crimes and/or now that Heinrich Himmler supported the Russian Liberation Army of General Andrey Vlasov, he wanted to eliminate a potential rival. The rest of the brigade was reformed into the 29th SS Waffen Grenadier Division "RONA", which was disbanded in November 1944.