The Wisconsin DOJ explained they were executing a warrant.
"The Wisconsin Department of Justice (DOJ) Medicaid Fraud Control & Elder Abuse Unit (MFCEAU) collaborated with State and Federal law enforcement, including the DOJ Division of Criminal Investigation, on the execution of a warrant on behalf of and with MFCEAU investigators. Special agents from the United States Department of Health and Human Services (U.S. DHHS) Office of Inspector General assisted, as well.
The evidence sought includes paper and electronic records that substantiate Dr. Nebojsa R. Stevanovic’s billing Medicaid and Medicare for services not rendered while he was traveling outside Wisconsin and abroad.
The warrant is under seal and charges have not been filed yet."
The I-Team went to the clinic to speak to Stevanovic. The doctors weren't there. An employee said they were on a scheduled day off.
There have been six complaints about the clinic filed with the State of Wisconsin Department of Safety and Professional Services since 2008. We looked into those claims and found none have been substantiated. But, people concerned about practices at the clinic contacted the I-Team over the last few months. Those concerns about prescription writing processes match up with what sources tell us about the investigation.
The Federal Drug Enforcement Agency said Friday they also have an investigation ongoing into the clinic.