I think the first thing to do is to start the conversation with allies, including our allies and partners in the Middle East itself. Of course, in my view, the best institution to work with would be the United Nations, to set up a court based on an international treaty that would be mandated to investigate and prosecute these crimes. Importantly, that would be hybrid in the sense that both Palestinian and Israeli judges, perhaps, as well as international judges from abroad would partake, and prosecutors as well.
This is difficult. It has never happened in an interstate conflict, but just because it has not happened before, of course, doesn't mean it's not worth exploring now.