Medical examiner who performed George Floyd's autopsy says Chauvin's knee would NOT cut off his oxygen and claims he died because having his neck compressed was 'just more than he could take,' given underlying heart disease Hennepin County Chief Medical Examiner Dr. Andrew Baker took the stand Friday in the tenth day of Derek Chauvin's murder trial Dr. Baker, one of the state's most significant witnesses, did not echo the testimonies of other state experts Asked if, in his opinion, the positioning of Chauvin's knee would cut off Floyd's oxygen supply, Dr. Baker said, 'In my opinion it would not'