The International Crminal Court is a permanent tribunal to prosecute individuals for genocide, crimes against humanity, war crimes, and the crime of aggression.
The United States, refuse to become a member or involved, even though another 108 states are members of the ICC.

Why Haven’t The United States Joined The International Criminal Court?

During negotiations, the US argued that its soldiers might be the subject of politically motivated or frivolous prosecutions.
Various safeguards were introduced, and Bill Clinton did eventually sign the treaty in one of his last acts as president.

However, the Bush administration was totally against the ‘international criminal court’ and to any ‘dilution of US sovereignty’ in criminal justice.

The US threatened to pull its troops out of the UN force in Bosnia unless they were given immunity from prosecution by the ICC.

In a much-criticised decision, the UN Security Council voted on 12 July 2002 on a compromise that gave US troops a 12-month exemption from prosecution. It was to be renewed annually.
But the Security Council, prompted by UN Secretary General Kofi Annan, refused to renew the exemption in June 2004, two months after pictures of US troops abusing Iraqi prisoners shocked the world.

Clearly Bush, Cheney & Rumsfeld & the other guilty members of the Republican party knew they could be found guilty worldwide and arrested in any of the ICC member countries in the future should they sign up. Of course, they still potentially could be, if any country possesses the courage, and the UN too, to secure convictions.
They knew what they were planning from the start, and have broken just about every rule in the book.

From Guantanomo Bay,

To Using Depleted Uranium Shells At War Knowing Innocent People, Men, Women & Children Would Be affected.
Look at these images. Imagine they were your loved ones. These people are the tip of the iceberg. Do you want to be part of a society that does this? That condones it? That allows those responsible to get away scott free? To walk free in the sunshine and continually make vast fortunes off the back of this? If you do nothing then you are condoning this.