Derek Chauvin Trial: Who are the witnesses?

Both the State of Minnesota and the defense team for former Minneapolis police officer Derek Chauvin will call several witnesses throughout the trial in the death of George Floyd.

Police surgeon: George Floyd died of positional asphyxia

Dr. William Smock, emergency room physician and police surgeon from Louisville, KY, says after reviewing George Floyd's case he determined he died of positional asphyxia and ruled out excited delirium. Dr. Smock is a medical expert for the prosecution in the Derek Chauvin trial.