Russian propaganda initially claimed the war there was "denazify" Ukraine and help its people.
He called for imprisonment, forced labor, and death for Ukrainians who refused to comply with the Kremlin's mission to assimilate the country into Russia.
The United Nations defines genocide as acts "committed with intent to destroy, in whole or in part, a national, ethnic, racial or religious group."
But the pervasiveness of anti-Ukrainian propaganda in Russian state media outlets, and the close control the Kremlin exerts over them, gives investigators an opening, he said.
In March, around the same time Russia's advance on Kyiv was halted by Ukrainian forces, the Kremlin's propaganda shifted.
If the evidence trail leads investigators back to Putin, international prosecutors could still decide to charge the Russian leader with genocide.
"I mean that for me at least would be some reason to celebrate, even if it's an incomplete solution.". »