vandThe FBI said it opened an investigation Monday into the fatal shooting of an unarmed black teenager by police in suburban St. Louis, a day after tension surrounding the case erupted in unrest following a candlelight vigil for the teen.¬†Questions loomed over the shooting of 18-year-old Michael Brown, who police said was unarmed and shot multiple times Saturday after an altercation with an officer in Ferguson. It’s unclear whether Brown or a man he was with was involved in the alleged scuffle, and authorities have been vague about what led an officer to open fire. But Dorian Johnson told WALB-TV that he and Brown were walking home from a convenience store when a police officer told them to get out of the street and onto the sidewalk. Johnson said they kept walking, which caused the officer to confront them from his car and then outside his car.¬†More