The moment police attempted to save a black man who later died after being restrained by security guards at a conference centre was played at an inquest into his death.
CCTV footage from the ExCel Centre in London showed Jason Lennon lying on the floor with three uniformed officers crouched over him.
His bare legs were visible among the group as they attempted to give him CPR.
Jurors at the inquest were warned prior to viewing the footage that some might find it distressing.
The short clip was played as a CCTV operator gave evidence describing how he controlled the cameras at the convention centre and described the events leading up to the incident.
Lennon, 37, who had a history of mental ill health and previously tried to take his own life, had been restrained by security staff after following a member of public into the Excel Centre in July 2019.
Jason Lennon (pictured), 37, who had a history of mental ill health, died after being restrained by security staff after following a member of public into London's Excel Centre in July 2019
When police arrived, he was being pinned to the ground by five security guards.
The inquest was told Lennon was lying face down and police handcuffed him before rolling his body over when they realised he was unconscious.
The officers carried out CPR and Lennon was taken to Newham Hospital where he was pronounced dead.
The inquest, being held at Barking Town Hall in East London is expected to last a month and hear from over 40 witnesses.
Lennon's family are represented by lawyer Fiona Murphy while other interested parties watching the proceedings via Zoom include the police, East London NHS Trust and the ExCel centre.
His immediate family are watching the inquest remotely from their home in Jamaica.
Coroner Graeme Irvine will determine whether Lennon was receiving the right care before he died, the impact of the restraint and the emergency care he received.
Ignatius Enemor, who was in the control room at the ExCel centre on the morning of the incident told the inquest he had received a report of an assault on staff.
When police arrived at the ExCel Centre (pictured), Lennon was being pinned to the ground by security guards. Police handcuffed Lennon before realising he was unconscious
He said staff were dealing with the incident and he dispatched a dog handler and a colleague to
