Baden, one of two doctors to conduct an independent autopsy that concluded that Floyd died of asphyxiation at the hands of local police on May 25, told Fox News that medics "tried to do CPR with him [Floyd] in the ambulance, but were unable to find a pulse.

GEORGE FLOYD'S FAMILY RELEASES INDEPENDENT AUTOPSY SHOWING DEATH BY ASFIXIATION .

According to the independent autopsy report released by Floyd's family, he died of asphyxia due to neck and back compression that led to a lack of blood flow to the brain.

Preliminary results from the official autopsy, which were included in a criminal complaint against former Minneapolis police officer Derek Chauvin -- who kneeled on Floyd's neck for eight minutes in the now-viral video -- said officials had found nothing "to support a diagnosis of traumatic asphyxia or strangulation." On Monday, an updated autopsy report classified Floyd's death as a homicide and listed the cause of death as "cardiopulmonary arrest complicating law enforcement subdual, restraint, and neck compression.".

Baden has conducted other independent reviews in similar cases of police brutality, including that of Eric Garner, a black man who was placed in a chokehold by New York police who were attempting to arrest him for selling loose cigarettes and would not relent even as he pleaded that he could not breathe.