A reconstruction and fresh appeal for information in the Bosham murder inquiry will feature on BBC's Crimewatch next week.
Valerie Graves was found dead with significant head and facial injuries at a house in Smugglers Lane, Bosham, on Monday 30 December. She and other members of her family had been staying at the property house sitting while the owners were away over the Christmas period.
Detective Superintendent Nick May from Surrey and Sussex Major Crime Team will appear in the studio and make a fresh appeal for information.
He said: "We are still appealing for information and would like to hear from anyone who saw anything suspicious or unusual in the area from the afternoon of Sunday 29 December to 10am on Monday 30 December."
Sussex Police are offering a reward of £10,000 for any information that leads to the arrest and conviction of the killer.
The appeal will be broadcast during the show on Monday, April 28 at 9pm.
Anyone with information should call 101 quoting Operation Ensign or email 101@sussex.pnn.police.uk or ring the independent charity Crimestoppers anonymously on 0800 555111.
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