More details have been revealed about the Independent Office for Police Conduct's investigation into how a Swindon man died while in custody.

Wiltshire Police officers arrested 37-year-old Piotr (also known as Peter) Rak at around 1.50am on Saturday, May 18, on Fleet Street on suspicion of being drunk in charge of his Audi vehicle.

Police had attended the location after receiving a call minutes earlier in relation to the Audi.

The IOPC understands that Mr Rak was seen by police getting into the stationary car when officers approached. He provided a positive breath test at the scene and was then taken to Gablecross Police Station, with custody authorised at around 2.45am.

Mr Rak was placed on regular observations by staff during his time in custody.

Shortly after 8am on Sunday, May 19, he was found to be experiencing a medical episode.

Staff started CPR and an ambulance arrived soon after. Emergency helicopter medics also attended. Sadly, Mr Rak was pronounced dead at the police station at 9am on Sunday.

After being notified by Wiltshire Police on Sunday morning, the IOPC sent investigators to the police station and post-incident procedures to begin their enquiries.

The investigation is looking at the circumstances of the arrest, including the decisions and actions taken in relation to Mr Rak’s detention and whether police officers and staff acted in accordance with local and national policies and procedures.

A post-mortem was held on Monday and further tests are being carried out. The coroner has been informed.

IOPC regional director Derrick Campbell said: “I send my sincere condolences to the family and friends of Mr Rak for their sad loss.

"We have now met Mr Rak’s family and explained our role and how our investigation will progress. We will be examining police actions in taking Mr Rak into custody and the level of care provided to him over the around 30-hour period he was detained.

“We are independent of the police and it is important that we carry out an investigation to fully establish the circumstances when someone has died in police custody.”

The IOPC haS begun to gather accounts from officers and staff involved as part of its initial enquiries.

It will also be viewing CCTV from the custody suite and body-worn video from officers who took part in Mr Rak’s arrest.