The IPCC is investigating the death of a man following his arrest at popular family holiday park Pontins.
Paul Gladwell, 38, from Colchester was first held by staff at Pontins Holiday Park in Lowestoft shortly before midnight on February 14.
He was later arrested by Great Yarmouth Police on suspicion of assault and fell ill whilst being transported in a police van.
After becoming concerned for his welfare officers stopped the van and called an ambulance.
The 38 year-old was treated at the scene before being rushed to hospital in a critical condition.
He died two days later on February 16.
The incident was referred to the Independent Police Complaints Commission as per procedure and an investigation has been launched.
The family of the man have been informed.
Investigators are carrying out house-to-house enquiries, speaking to witnesses and gathering CCTV footage.
IPCC Commissioner Cindy Butts said: “Our thoughts are with the man’s relatives and friends at this difficult time.
“Our investigators will be conducting a thorough enquiry into all the circumstances surrounding his interaction with the police.”