The US Justice Department has opened a separate, federal, civil rights investigation into the death of Michael Brown, President Obama said. .
He said: "They are on the ground and along with the FBI they are devoting substantial resources to that investigation."
He added: "The US Attorney General will travel to meet with the FBI agents conducting the federal criminal investigation."
More top news
The acclaimed conductor will direct the Mariinsky Theatre's Symphony Orchestra at the UNESCO World Heritage Site.
The makers of the hit "Making a Murderer" documentary on the "epic" story that has seen it nominated at this year's Bafta TV awards.
Would you step-in and possibly prevent a crime, or help a stranger in need, even if means putting yourself at risk?