A Department of Justice letter sent to the Police Chief Tom Jackson of Ferguson, Missouri on Friday instructed all officers to stop wearing “I Am Darren Wilson” bracelets. Another letter issued on Tuesday ordered members of the police department to wear readable name plates, after officers were seen wearing unidentifiable tags or none at all.

There's a lot we know about the death of Michael Brown and its aftermath, but many questions remain unanswered.

It’s been 11 days since Michael Brown, an unarmed black teenager, was shot dead by Darren Wilson, a white policeman in Ferguson, Mo. Since then, the violent protests that followed have drawn national attention and flummoxed authorities and elected officials looking to lower the temperature. But we’re still missing a lot of key facts about the incident and the ongoing investigations. Despite a calmer night on Tuesday, no one knows when the nightly clashes will end.

Amnesty International has sent monitors to the scene. Palestinians are tweeting advice on how to cope with tear gas. Tibetan monks have showed up to offer prayers. Russian officials, Iran’s official news agency and China’s state-run media are offering lectures on human rights abuses.

What started as a small-town police shooting of an unarmed 18-year-old black man in suburban St. Louis has quickly become an international incident.