Regarding the crime of Genocide, depending on where you look, there are a lot of dead Iraqis:
One has to wonder how many dead people a genocide makes. In Bosnia, the ethnic cleansing was estimated at around 200,000. Milosevic stood trial at The Hague for that.
Ok, crimes of genocide. Check.
What about the crime of Aggression? Marjorie Cohn says:
Bush’s new doctrine of “preemptive war” is a license to prosecute wars of aggression. It runs directly counter to the United Nations Charter’s prohibition on the use of armed force except in self-defense or when authorized by the Security Council. A preemptive war is a war of aggression. “Operation Iraqi Freedom” falls squarely into this category.
Kofi Annan also challenged the US doctrine of preemptive war saying that it “posed a fundamental challenge to the United Nations and could lead to a global free-for-all.”
So, crimes of aggression. Check.