On March 17, a federal jury convicted two Miami-Dade County, Florida, doctors and two medical assistants of fraud and other charges for manipulating patient blood samples, falsifying medical records and writing prescriptions for obsolete HIV medications, The Miami Herald reports.

The two doctors—David Rothman, MD, and Keith Russell, MD—are under house arrest until their June 26 sentencing; medical assistants Eda Marietta Milanes and Jorge Luis Pacheco are being held at the Federal Detention Center in Miami.

“I now know it was something despicable,” testified Tony Marrero, the owner of the two HIV clinics involved in the scandal. He pleaded guilty with three other defendants before the trial.

According to the article, Marrero’s clinics filed $5.3 million in false HIV therapy claims while tampering with patient blood samples to justify the prescriptions. The clinics used fake invoices from a drug wholesaler to give the impression that they had given the infusion therapy to patients, and they even emptied the medication bottles to make it appear that they had been used.