GENEVA (Reuters) – The head of a U.N. team of investigators on Myanmar said on Monday that Facebook has handed over millions of items that could support allegations of war crimes and genocide. The Independent Investigative Mechanism for Myanmar (IIMM) aims to build case files for proceedings in national, regional or international courts. It was established in 2018 by the U.N. Human Rights Council and began work the following year. “Facebook has shared with the mechanism millions of items from networks of accounts that were taken down by the company because they misrepresented their identity,” …