Derek Chauvin

Dr. David Fowler disputed the conclusion by the Hennepin County medical examiner that "homicide" was the manner of George Floyd's death. The defense witness said the manner was "undetermined."

The defense showed video from a 2019 traffic stop in which George Floyd was a passenger, and interviewed a paramedic who treated Floyd that day.

"No reasonable officer would have believed that that was an appropriate, acceptable or reasonable use of force," Seth Stoughton, a former police officer and use of force expert, told jurors.

The Brooklyn Center, Minn., officer who is said to have shot Wright is Kim Potter, a 26-year veteran. Police Chief Tim Gannon said the officer meant to deploy a Taser — but pulled a gun instead.

"I can state with a high degree of medical certainty that George Floyd did not die from a primary cardiac event and he did not die from a drug overdose," cardiologist Dr. Jonathan Rich says.

Hennepin County Medical Examiner Dr. Andrew Baker testified Friday that Floyd's subdual and neck compression by police was more than his body could handle, given his underlying heart conditions.

"A healthy person subjected to what Mr. Floyd was subjected to would have died," pulmonary specialist Dr. Martin Tobin told jurors on Thursday.

Senior Special Agent James Reyerson changed his own testimony on Wednesday, after first saying Floyd admitted, "I ate too many drugs." The reversal was a blow for defendant Derek Chauvin.

The officers could have taken other measures, including simply talking to George Floyd, says Sgt. Jody Stiger, a use-of-force expert at the Los Angeles Police Department.

"Just because [someone is] speaking does not mean they are breathing adequately," Minneapolis police medical support coordinator Nicole Mackenzie testified.

Lt. Johnny Mercil and Sgt. Ker Yang are the latest in a string of police officials who are testifying about the department's training and Derek Chauvin's use of force against George Floyd.

"To continue to apply that level of force to a person proned out, handcuffed behind their back – that in no way, shape or form is anything that is by policy," said Chief Medaria Arradondo.