I see some great debate going on! Here are some articles that might help enrich your knowledge of the cases that will be discussed in court.
These articles discuss prosecution against Omar-Al-Bashir. Although both are dated by a few months, the information is relevant for everyone. They provide important information for those prosecuting Sudan, and will help those defending it be prepared to answer certain accusations. Those of you who are judges and witnesses for the case will find the second article particularly helpful, since it addresses actual recognition of Al-Bashir's crimes by the ICC.
The next website will take you to an article on Bush's war crimes in the War on Terror, and focuses on torture and crimes specifically towards children. It is a question of major importance to crimes against humanity regarding the War on Terror, and brings all these crimes together in a legal perspective.
And finally, here is one more article selected from the Huffington post once again:
Although it is rather dated, it will give those of you representing European nations especially a deeper understanding of the roles of activists accusing Bush. This set of points highlights many accusations to be brought upon the Bush Administration, so the USA might also find this helpful to come up with back-up arguments.
Hopefully these articles may contribute to your understanding of each topic.