As protests and unrest continued in Minneapolis following the killing of George Floyd, people are questioning the identity of a man filmed smashing windows. Footage emerged of the white man, dressed all in black, and in gloves and boots, calmly smashing the windows of an auto parts store with a large hammer. His face is obscured by an expensive-looking gas mask and he is also holding an open black umbrella - although it was not raining. Twitter quickly christened him 'Umbrella Man'. As he methodically smashes the windows of the Minneapolis branch of AutoZone, video shows that he is confronted by two people, apparently trying to stop him, before he turns and walks quickly away. A small group follows him and he tries to snatch the phone of the person filming. Someone yells: Are you a f***ing cop?" Twitter users have accused him of being everything from an undercover police officer, to part of Antifa, to a white supremacist, or an agent provocateur there to incite violence that would ultimately trigger a widespread riot. The incident was recorded before fires were started. Minnesota's attorney general Keith Ellison even chimed in, tweeting: "This man doesn't look like any civil rights protester I have ever seen. Looks like a provocateur. Can anyone ID him?" A popular theory that went viral identified a specific police officer from neighbouring St Paul by name, based on screenshots of a series of text messages purportedly from a former partner. The identity of 'umbrella man' continues to be a subject of speculation and rumour.