George Floyd's deaths have led to massive demonstrations, and were part of the Black lives matter movement spreading like wildfire around the world.
The police officer who was charged with Floyd's death is suspected of having pressed his knee against Floyd's neck for almost nine minutes so hard that it eventually took his life.
At the end of March, the trial began, with a strong focus on establishing the cause of death, to determine whether Floyd was strangled to death by the police, or whether his previous heart defects and the drugs found in his blood were the real cause.
Hear the summary of the George Floyd case in the clip above.