Forensic pathologist Dr Lindsey Thomas said "the activities of the law enforcement officers resulted in George Floyd's death" from lack of oxygen.
Iran Press/ America: US Police officer Chauvin, 45, was filmed kneeling on Floyd's neck for more than nine minutes during his arrest last May.
The ex-officer is on trial for murder and has denied the charges against him.
The footage of Chauvin, who is white, with his knee on African-American Floyd's neck sparked global protests against racism.
Derek Chauvin, 44, who was filmed kneeling on George Floyd's neck for almost nine minutes last May, is already charged with second-degree murder and manslaughter charges which carry a maximum sentence of 40 years.
The death of George Floyd, an African-American man, occurred in Minneapolis, Minnesota on May 25, 2020. It has caused a lot of unrest in American cities.
George Floyd died at the hands of a Minneapolis police officer. The video of Floyd pleading with the officer, who pressed a knee into Floyd’s neck for nearly nine minutes until Floyd stopped moving, sparked widespread outrage and mass protests across the country and other parts of the world.
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