Dr. Bradford Wankhede Langenfeld, the emergency room doctor who attended to George Floyd and later pronounced him dead, testified that hypoxia via asphyxiation was his leading theory as to what caused the cardiac arrest that killed Floyd.
ER doctor that declared George Floyd dead says he likely died from lack of oxygen
The emergency room doctor that declared George Floyd dead testifies at Chauvin trial that Floyd died from insufficient oxygen.
USA Today News (International)