The Independent Police Complaints Commission is investigating after an ambulance was called to an unconscious prisoner.
Officers arrested a 48-year-old man in Oldham on 4 March, before taking him to a cell in Ashton-under-Lyne. They suspected he was "intoxicated" and placed him under observation.
The man was later found unconscious and taken to hospital. Medics eventually sent him home.
– James Dipple-Johnstone, IPCC Commissioner
Our investigation is in its early stages and we have visited the man concerned to explain our involvement.
We will be investigating whether officers and staff applied the appropriate duty of care to this individual and checking whether any searches of the man’s person on his arrival were carried out satisfactorily. The outcome of this incident could have been even more serious and we need to look at whether safe custody procedures were followed.