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Genocide is the crime.

Yes. Which falls under the rubrik of 'crimes against humanity'.

(excerpt)

Unlike war crimes, crimes against humanity can be committed during peace or war.[2] They are not isolated or sporadic events, but are part either of a government policy (although the perpetrators need not identify themselves with this policy) or of a wide practice of atrocities tolerated or condoned by a government or a de facto authority.

War crimes, murder, massacres, dehumanization, genocide, ethnic cleansing, deportations, unethical human experimentation, extrajudicial punishments including summary executions, use of weapons of mass destruction, state terrorism or state sponsoring of terrorism, death squads, kidnappings and forced disappearances, use of child soldiers, unjust imprisonment, enslavement, torture, rape, political repression, racial discrimination, religious persecution and other human rights abuses may reach the threshold of crimes against humanity if they are part of a widespread or systematic practice.

Did you catch this one in the category of 'crimes against humanity?

unethical human experimentation

So we don't even need to be talking about 'genocide'.

From your link:

Crimes against humanity are not codified in an international convention, although there is currently an international effort to establish such a treaty, led by the Crimes Against Humanity Initiative.

There is no authoritative codification of Crimes Against Humanity.

Of course, I suppose one could run to the ICC with accusations of it. See if you can get them to prosecute and punish.