The man in his fifties had got into difficulties in water.
He after being pulled from the water in Stowe Pool, Lichfield, yesterday (8 July).
Emergency services including West Midlands Ambulance Service, Staffordshire Fire and Rescue Service also attended the scene.
He was taken to hospital but despite the best efforts of staff, he died a short time later.
There are believed to be no suspicious circumstances and the man’s next of kin has been informed. A report is being prepared for HM Coroner.
The matter is being referred to the Independent Office for Police Conduct (IOPC) due to previous police contact.
Anyone with information is asked to call 101 quoting incident number 638 of 8 Jul