Link is to a Substack that summarizes the study and interviews one of its authors. Here's the audit itself (PDF).

Of the 87 deaths the auditors examined, they found 36 in which the Maryland Office of Chief Medical Examiner (OCME) should have classified the manner of death as a homicide, but instead classified it as something else. The audit also found that OCME pathologists were less likely to classify deaths in police custody as a homicide when the decedent was black. The auditors, who again were initially blinded to the race of the decedent, had no statistically significant racial disparity in their manner of death determinations.

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Opening of the interview. "Can you talk a little about how this report came about?"

When Derek Chauvin was tried for Floyd’s murder, the former chief medical examiner in Maryland, David Fowler, testified for Chauvin defense. He claimed that the manner of death in the case should have been labeled “undetermined” rather than “homicide.” He offered various theories as to why he thought it was not clear that this was a homicide, even though we all saw Chauvin kneel on Floyd’s back for an unconscionably long period of time.

So, after Fowler gave that testimony, a large group of medical professionals wrote an open letter complaining about Fowler’s testimony and calling for an investigation. It was ultimately signed by over 500 medical professionals. Interestingly, it did not include a lot of active medical examiners.