A 38-year-old man, from the West Midlands area, was arrested in December 2021 and has been released under the ongoing ‘Operation Anzu' investigation.
A Staffordshire Police spokesperson said: ‘Our investigation continues while we diligently work through all of the available information.
‘We have received written advice from the CPS on submission of a case file, and all agencies continue to work collaboratively to enable a final charging decision to be made.'
In a joint statement, University Hospitals of North Midlands NHS Trust and Dudley Group NHS Foundation Trust said: ‘The police are looking into concerns about the appropriateness of care provided by an individual who worked in the NHS and previously worked at both Russells Hall Hospital and Royal Stoke Hospital. This individual no-longer works at the either hospital.
‘We have written to a number of families about the care they or their family member received and we have advised them to speak to the police.'