By The F.B.I. and Minnesota law enforcement authorities are investigating the arrest of a black man who died after being handcuffed and pinned to the ground by an officer’s knee, in an episode that was recorded on video by a bystander and that sparked large protests in Minneapolis on Tuesday.
After the graphic video circulated widely on social media, the mayor denounced the actions of the four officers who were involved and said on Tuesday afternoon that they had been fired. He identified the victim as George Floyd.
Mr. Floyd, 46, a resident of St. Louis Park, Minn., a Minneapolis suburb, was pronounced dead at 9:25 p.m. Monday at Hennepin County Medical Center, according to the medical examiner.
