Ms Hunt, 47, from Rainham, east London, was assaulted near to the A1306 Arterial Road at around 8.30am on Friday, April 20.
Despite the best efforts of paramedics, sadly, she died at the scene.
Weâ??re trying to locate the drivers of four cars which were driving in the area at around the time of the incident and may have seen what happened.
The four cars are a small black car, a small silver hatchback, a white hatchback, and a gold people carrier.
If you recognise any of these vehicles or think you are the driver of one of them please call the Serious Crime Directorate on 101 quoting incident 228 of 20/04.
Alternatively you can email scd.appeals.essex@essex.pnn.police.uk or contact Crimestoppers anonymously on 0800 555 111.
Florin Ion, 31, of Ipswich Crescent, Birmingham has been charged with murder and is next due to appear in court on May 22.
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