It comes as a review of the investigation resulted in a specific forensic line of enquiry being identified and this has been actively pursued by officers since 2017.
Thirty-five-year-old Jennifer Kiely’s body was found after a fire in a shelter on the lower promenade at Holywell on the morning of January 22 2005
Jennifer had suffered multiple stab wounds and her body had been set on fire.
The initial investigation closed in May 2007 and in 2009 the case was assessed and deferred for further assessment as there had been no new intelligence or other development.
However, since 2011 it has been a live case while forensic reviews and further work have been commissioned.
Sussex Police said that since 2017 officers have been working on the new forensic line of enquiry relating to unidentified DNA found at the scene.
Jennifer’s family is aware of the current line of enquiry and continues to have the support of family liaison officers from Sussex Police.
Jennifer’s mother, Margaret Kiely, said, “I always find the anniversary an upsetting time and there isn’t one day when I do not think about Jennifer and what happened to her.
“I support this appeal and anything that will increase the chance of my daughter’s killer being caught”
Detective Superintendent Emma Heater of the Surrey and Sussex Major Crime Team said, “Please do not hesitate to come forward if you have any information, either something you remember from 2005 that was not reported or that you may have heard since. As a result of the further forensic evidence we have the ability to eliminate people from our enquiry.
“Jennifer’s family deserves to know what happened to her and who is responsible.
“Further information about the current line of forensic enquiry is not being revealed at this time, but if anyone has any information that was not shared with us during the original investigation or since, no matter how small you may think it is, please report online or call 101, quoting Operation Kittiwake.”