The ICC is the only international court with jurisdiction to prosecute individuals for the international crimes of genocide, crimes against humanity, war crimes and the crime of aggression.
https://how-the-icc-works.aba-icc.org/
Reads to me the crimes of Putin to this point, he could well comit more atrocities yet, are 100% under the ICC's jurisdiction.
If it was not in their jurisdiction, why is the ICC investigating said crimes with view to prosecution?
https://www.google.com/amp/s/thecon...mes-in-ukraine-could-putin-be-indicted-178005
The simple fact is though, the court has to prove "intent".
And that is incredibly hard to do.
But reading the above articles, Truss is correct, the ICC route is the way to go currently, as the other tribunals mentioned, do not exist yet, but the ICC does exist, and is currently investigating.