MINNEAPOLIS (AP) — An autopsy commissioned for George Floyd’s family found that he died of asphyxiation due to neck and back compression when a Minneapolis police officer held his knee on Floyd’s neck for several minutes and ignored his cries of distress, the family’s attorneys said Monday.

Floyd’s family, like the families of other black men killed by police, wanted an independent look because they didn’t trust local authorities to produce an unbiased autopsy.

Baden is the former chief medical examiner of New York City, who was hired to conduct an autopsy of Eric Garner, a black man who died in 2014 after New York police placed him in a chokehold and he pleaded that he could not breathe.

He said Brown’s autopsy, requested by the teen’s family, didn’t reveal signs of a struggle, casting doubt on a claim by police that a struggle between Brown and the officer led to the shooting.

When asked to respond, Mayor Jacob Frey said: “For a man who complains so frequently about a lack of community trust and support for the police department, Bob Kroll remains shockingly indifferent to his role in undermining that trust and support.”