The New York Times is reporting the results of a private autopsy that found Mr. Floyd's death was caused by all three offices working in tandem. The two pressing down on his back prevented him from filling his lungs. The one pressing down on his neck contributed to that. The result was Mr. Floyd's death by asphyxiation.
The private autopsy, which was conducted by highly skilled professionals, reached conclusions at variance from the Hennepin County autopsy. For instance, it found no evidence Mr. Floyd was in poor health at the time of his death. It found the cause of death to be asphyxiation, rather than coronary arrest, and so forth
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You have to scroll down to the autopsy report.
The Hennepin County Report would support a ruling of homicide with perhaps mitigating factors. The private autopsy is much more damning.