Historically, only the UN Security Council could appoint criminal tribunals for war crimes and crimes against humanity. As evidence of the Russian military’s war crimes mounts, experts and diplomats expect any attempt to create a tribunal would be vetoed by Russia, which is a permanent member of the Security Council. Marco Werman interviews Tom Dannenbaum, a lawyer specializing in war crimes accountability who, along with a handful of others, believes it’s possible to legally create a tribunal without Russia’s agreement.