Answer:
George Floyd's death occurred on May 25, 2020, when Derek Chauvin - a white police officer - arrested Floyd and knelt on his neck for approximately 9 minutes and 30 seconds after he was handcuffed and lay face down on the floor.
The incident was filmed by several attendees who asked Chauvin to remove his knee from Floyd's neck. Likewise, the police officers were wearing body cameras, which also recorded the entire interaction with Floyd. Although the footage from operated body cameras was eventually also released, this did not happen until months after the incident itself and the publication of the private video footage. The day after the arrest - after several eyewitnesses had released their video footage of the incident - all four police officers were fired. Two autopsy reports subsequently found that Floyd had been killed, although the conclusions of the two reports as to the cause of death are not conclusive.
The incident, including in particular various video recordings, created a great deal of attention worldwide. In the United States, the incident led to large-scale demonstrations organized by Black Lives Matter around various American cities. Several of the demonstrations in the United States were accompanied by various forms of swelling, violence, street fighting and other forms of crime. President Donald Trump in several cases ended up approving the deployment of extra police officers to reduce the violence that ensued following the demonstrations. The case was a wake-up call to American society regarding institutional racism, especially in police agencies, as well as a sign of their brutality.