Most of the investigations concerned doctors and nurses who exercised independent judgment and didn’t always follow the party line. From Alice Giordano at The Epoch Times via zerohedge.com:
Hundreds of nurses and doctors, including a chief medical examiner, have been investigated by the state of Michigan on COVID-related allegations ranging from videotaping a wedding where some guests weren’t wearing masks to telling trick-or-treaters not to get the vaccine.

Authorities dismissed many of the complaints. Dozens are still pending, with a number referred for disciplinary action. Some have been referred to the Michigan Attorney General’s office for criminal prosecution.
An allergy and asthma specialist is the subject of one of the referrals sent to the attorney general. The complaint accuses the doctor of prescribing “a lethal dosage” of ivermectin.
Copies of the complaints, which total more than 500, were provided exclusively to the Epoch Times. The Pacific Justice Institute obtained the records through a FOIA request. The institute represents some of the accused nurses and doctors.