Was Pedophile Cover-Up a Crime Against Humanity Prosecutable in International Criminal Court?

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British attorneys are going to challenge the Vatican's immunity:

Prosecution in the deepening cleric sex abuse scandal, however, ultimately rests on the question of immunity. If British judges do challenge the pope's immunity, there are a handful of possible legal scenarios — all of them speculative. The pope could be served for a writ for civil damages, a complaint could be lodged with the International Criminal Court, or abuse victims could try to have Benedict arrested for crimes against humanity — perhaps the least likely scenario.
Lawyers question whether an alleged systematic cover-up could be considered a crime against humanity — a charge usually reserved for the International Criminal Court — and whether it could be pursued under universal jurisdiction

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Pope's immunity could be challenged in Britain