Bedfordshire Police and Crime Commissioner Olly Martins has been interviewed under police caution as an investigation into the leak of information continues.
The Independent Police Complaints Commission quizzed Mr Martins last week, after the commissioner admitted passing “confidential information” about the death of Leon Briggs to a Home Office worker.
An IPCC spokesman said: “We have interviewed Mr Martins under criminal caution at our offices, the investigation is progressing well, and we have been keeping the family updated.”
Mr Briggs, of Ashburnham Road, died after being arrested on November 4.
The details of the incident were further circulated by the Home Office employee who, according to Mr Martins, “did not appreciate the sensitivity of what had been said”.
The commissioner was given a written warning for the leak and the Bedfordshire Police and Crime Panel warned Mr Martins about his future conduct.