The traffic stop was routine, at first. A police officer pulled over a white Oldsmobile for a broken light on a middle-class suburban Twin Cities street.
But minutes later, Philando Castile, a 32-year-old school cook from St. Paul, lay bloodied from gunshots and dying in the driver's seat, his final minutes live-streamed on video for the world to see by his girlfriend sitting alongside him.
Late Thursday, the officer was identified as Jeronimo Yanez, who fired multiple times. Yanez and Joseph Kauser, who also was part of the traffic stop, have been placed on paid leave. Both have been with the St. Anthony Police Department for four years.
The Wednesday night police shooting of Castile, who is black, and the gruesome image of his lifeless body reverberated across the country and around the world Thursday, drawing swift and raw reaction from outraged friends and relatives to the nation's top political leaders, some of whom called for prompt changes to law enforcement practices and the way police interact with communities of color.
It marked the second time in eight months that Minnesota was thrust into the spotlight in the long-sizzling debate. This time, the response was more profound and immediate, drawing thousands of frustrated protesters to St. Paul, where about 100 gathered in the morning at the governor's residence and more than 4,000 at night for a vigil at the school where Castile worked.
Then early Friday, protesters and police were involved in a confrontation in St. Paul at Summit Avenue and Oxford Street, an incident being shown on the Internet live.
Other footage shared on social media showed police activity elsewhere on Summit and Grand avenues.
On the Unicorn Riot livestream, a person who gave his name as Lorenzo said people began marching toward police early Friday and a window on a police vehicle was "taken out," which led to more police arriving in the area. When the officers arrived, some of the protesters headed toward Grand Avenue, according to Lorenzo. The standoff at Summit and Oxford appeared to be breaking up shortly before 3 a.m.
When reached by phone, a St. Paul police spokesman would not comment on any activity early Friday.
On Thursday, the protesters and officials were asking questions.