A US Air Force sergeant with links to the far-right Boogaloo Bois movement has been charged with the murder of a federal security officer in California, the FBI says. Steven Carrillo is accused of killing David Patrick Underwood outside the courthouse in Oakland during Black Lives Matter protests last month. He was already charged with the murder of another officer eight days later.

Damon Gutzwiller was killed in an ambush near Santa Cruz on 6 June. Mr Carrillo, who is stationed at Travis air force base, was arrested during a subsequent confrontation. He appears to have used his own blood to write various phrases on the bonnet of a car he stole, the FBI said, including “boog” and “stop the duopoly”. “Boogaloo” is a term used by extremists to reference a violent uprising or impending civil war in the US, the FBI said. Adherents of the loose grouping known as Boogaloo Bois, which some liken to a militia, are anti-government and often carry assault weapons.(BBC)…[+]