- 3 updates
Five men have been arrested so far in connection with the investigation - but police are appealing for more information.
Det Chief Inspector Lucy Robinson from the Kent and Essex Serious Crime Directorate said:
Any witnesses who have not yet contacted police or anyone with information about events leading to the incident should call detectives on 01279 621802, email firstname.lastname@example.org or can contact Crimestoppers anonymously on 0800 555111.
Police have also released an image of the Mercedes box lorry that Mr Fletcher had been driving, in the hope that it may jog memories.
Police have released a photograph of a delivery driver lying unconscious in hospital, after being run over while attempting to stop his lorry being stolen.
David Fletcher from Upminster has been in intensive care since the incident on Tuesday 9th July - and has not regained consciousness. Police say his injuries are extensive - and likely to be life-changing.
The 58-year-old father of three had been making a delivery to a house in Wood Avenue in Purfleet, when two men jumped into his Mercedes lorry and tried to drive off.
He chased them and tried to grab hold of the keys through the driver’s window, but was dragged along the road for approximately 10 metres before being thrown from the moving vehicle. The lorry then drove over him.