I understand that. But I am specifically questioning if it was used to actually commit a war crime which is what the school attack was identified as by the U.N.
You have your answer already. Unless you don't believe what the UN said about it.
When you are the USA you cannot commit war crimes, only other nations can do that.
I hope we'll find out the details of AI's potential involvement when the current administration gets called into the International Criminal Court to stand trial for their war crimes. I don't expect that to happen, but I'll keep hoping that it will.