Police are appealing for witnesses after a woman from Henfield died on Monday (March 2).
Johanna Moulds, of Wantley Hill Estate, was walking behind a black Honda CRV when she went to the ground in High Street, Henfield, at about 10.45am on Friday January 30.
The 79-year-old was taken to Worthing Hospital and was treated for a fractured hip, her injuries were not thought to be life-threatening.
Police said Mrs Moulds was readmitted to hospital days later and died on Monday March 2.
PC Doug Park said: “We need to speak to anyone who saw what happened or Mrs Moulds on the ground. If you were in High Street at the time please contact us.”
Anyone with any information should email email@example.com quoting serial 385 of 30/01, call 101 or contact the independent charity Crimestoppers anonymously on 0800 555111.