A doctor accused of secretly filming his colleagues in hospital bathrooms across Melbourne has been denied bail after police analysed a hard drive containing over 10,000 videos and images.

Ryan Cho, 27, appeared in Melbourne Magistrates’ Court on Friday after police laid charges related to stalking his colleagues, using an optical surveillance device and producing intimate images.

Cho’s former colleagues allegedly discovered a hidden camera in a staff toilet during his time as a junior doctor at the Austin Hospital in Heidelberg, Victoria.

Police alleged that since 2021, Cho caught footage of at least 460 female victims in toilets and showers at the Austin Hospital, the Royal Melbourne, and the Peter MacCallum Cancer Centre.

“All these files depict the genital or anal regions of the victims in vulnerable positions," police alleged in court documents seen by ABC News .

“The majority of victims depicted in these videos appear to be female doctors, nurses, paramedics and staff members of medical facilities the accused has worked at since 2021.”

One hard drive analysed by police allegedly contained 10,374 videos and images which were meticulously organised by hospitals, wards and dozens of victim names.

Police accused Cho of capturing some 4,500 videos, while files were allegedly ranked and separated into groups labelled ‘Tier 1’ and ‘Tier 2’.

A hidden camera was placed in a staff toilet at Austin Hospital in Heidelberg, Victoria. Photo: Supplied

“The accused named at least 460 female victims in total, categorising the intimate videos into folders associated with names and workplaces," the documents alleged.

Staff no longer feel safe

The court documents alleged investigators had received reports from hospital staff and management that Cho’s alleged victims were “suffering trauma” and were “fearful of using the hospital facilities”.

“Staff are no longer feeling safe in their workplace,” the documents read.

In addition to hospital bathroom footage, 9News reported some videos were allegedly filmed inside homes.

In a statement to Information Age, chief executive officer at Austin Health, Jodie Geissler, said the situation had been “incredibly distressing” for staff.

“Their safety and wellbeing is our absolute priority,” said Geissler.

“Right now, our focus is on caring for our staff.

“We have comprehensive support services in place and are doing everything we can to help them through this challenging time.”

Geissler added the hospital has been working closely with Victoria Police to “fully support their investigation”, while a spokesperson for the Australian Health Practitioner Regulation Agency (AHPRA) confirmed the public register shows Cho’s registration was suspended last week.

“This means he is not able to practise anywhere in Australia,” they told Information Age.

Police seize phones, mesh bags and hooks

Victoria Police told Information Age it would not comment while the matter was still before the court, though a public statement detailed the arrest of an unnamed 27-year-old man at a property in Croydon on Friday.

After an interview with detectives from Mernda Sexual Offence and Child Abuse Investigation Team, the man received five charges related to producing intimate images, using a surveillance device, and failing to assist police.


Cameras were hidden in various toilets in Victorian hospitals. Photo: Shutterstock
These were in addition to stalking and surveillance charges previously laid on 10 July following an incident on 3 July, when a recording device was allegedly found in a restricted staff toilet of the Austin Hospital.

Victoria Police said the device – a mobile phone – was alleged to have “been in place for some time” before staff noticed and reported it.

“As part of the investigation, several additional hospitals where the man worked between 2020 and 2025 have been identified as workplaces of interest,” wrote Victoria Police.

“These hospitals are located in Melbourne’s CBD and regional Victoria.”

“Police have begun the process of contacting the additional hospitals and those potentially impacted during the time of the man’s employment.

“This process is due to take some time.”

Court documents showed police seized two mobile phones, a laptop, a hard drive, several white mesh bags and removable hooks, while ABC News reported Cho allegedly refused to hand over passwords for the devices.

Cho has contested the charges laid against him, while police alleged Cho was a flight risk with no ties to Victoria.

He has been denied bail and is scheduled to return to the Melbourne Magistrates' Court in November.