Medical expert testifies George Floyd died from low oxygen levels l GMA

Dr. Martin Tobin told the jury that the cause of George Floyd's death was low oxygen levels caused by shallow breaths due to Floyd's body position and the pressure of Derek Chauvin's knee on his neck.

STREAM LIVE: Murder trial of Derek Chauvin in the death of George Floyd resumes: https://abcn.ws/39SYlqT

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