Greek police have arrested two doctors over the death of veteran singer Giorgos Mazonakis, whose fatal cardiac arrest during a private blood-plasma procedure in Athens has exposed a scandal over unlicensed medical treatment.
Investigators identified the doctors as Ilias Theodoropoulos and Ioanna Gaka.
Theodoropoulos, an internal medicine specialist, owns the clinic, and Gaka, also a doctor, is his wife. Mr. Theodoropoulos and Mrs. Gaka now face charges of fatal exposure, a crime carrying at least six years in prison if it results in death.
Prosecutors said contradictions emerged in Mrs. Gaka's statement to police.
She initially said Mr. Mazonakis, 54, arrived at the clinic at 4:30 p.m. Wednesday, but security footage showed he had actually arrived at 1 p.m.
Data pulled from the clinic's plasmapheresis machine showed it ran for 45 minutes, raising the possibility that Mr. Mazonakis died during the procedure itself.
The Athens Medical Association said the clinic was licensed only for general internal medicine and was never authorized to perform plasmapheresis — a specialized procedure it said requires trained staff and cannot legally be conducted outside proper facilities. Inspectors reported finding two plasmapheresis machines on-site during an unannounced search, despite routine inspections in 2024 and 2025 that found no such equipment.
Investigators also searched the couple's home in the northern Athens suburb of Psychiko, seizing patient files, medical supplies and staff records.
The doctors are expected to appear before a prosecutor, who will decide whether to formally file charges. A postmortem examination, conducted with an independent adviser appointed by the Mazonakis family, is pending and expected to determine the official cause of death.