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Cho was employed at the Royal Melbourne between February 2024 and February 2025, before moving to work at the Austin.
He was originally charged on July 10 after a device was found in the staff toilets and showers at the Austin.
But police laid further charges a week later after reviewing hundreds of hours of footage. A court heard that their investigation had widened after named folders were uncovered on devices seized from Cho’s home.
“There is approximately 4500 intimate videos captured using toilet and shower facilities, capturing the genital and anal regions of people in vulnerable positions,” Senior Constable Narelle Baker told the court in July.
“It names at least 406 female victims … categorised into folders with names and workplaces. Female doctors, nurses, paramedics and other staff.”
Police said on Wednesday they expected to identify further victims, but said it would take “some time” as they continued to comb through hundreds of hours of vision.
It took two weeks from his arrest for the health regulator, the Australian Health Practitioner Regulation Agency, to bar the junior doctor from practising medicine.
This masthead revealed the Royal Melbourne Hospital launched an internal investigation in January after discovering a strategically placed phone in the intensive care unit bathrooms. However, the phone was never passed on to police.
Royal Melbourne’s failure to inform police prompted concerns among hospital workers that the covert filming of doctors, nurses, paramedics and patients could have been discovered months before it was finally investigated by police.
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It was only after Austin Hospital staff discovered a recording device in an employee bathroom on July 3 that police were alerted and investigations focused on Cho.
At the time, internal investigations had already begun into toilet blockages and damage that police now allege was done to force victims into cubicles where cameras were hidden.
The Age is not alleging that the phone belonged to Cho, only that it was found during his time working at the Royal Melbourne.
If you or anyone you know needs support, you can contact the National Sexual Assault, Domestic and Family Violence Counselling Service on 1800RESPECT (1800 737 732), Lifeline 131 114, or Beyond Blue 1300 224 636.
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