The mother of murdered schoolgirl Nikki Allan is calling for a full reinvestigation of the crime.
Sharon Henderson has launched an on-line petition urging Northumbria Police to carry out a top-to-bottom review of the case.
The page, on petition site change.org, attracted more in 500 signatures in less than 24 hours.
“I am not asking the police to reopen the case, because they have never closed it,” said Sharon.
“They tell me they keep going back to it, but when are they going back?
“I want the police to reinvestigate it from the beginning.
Too many things have happened with Nikki’s case that need putting right.Sharon Henderson
“I put the petition on-line and in less than a day it had 500 signatures from all the people who support Justice for Nikki Allan.”
Eight-year-old Nikki’s battered body was discovered in a pool of blood in the derelict Quayside Exchange building after she vanished after leaving her grandparents’ home in Wear Garth in the East End on October 7, 1992.
Local man George Heron, then 24, stood trial at Leeds Crown Court in October 1993, but was acquitted.
The continuing investigation has included a reconstruction for BBC show Crimewatch in September 2013, which prompted a flurry of calls and sparked a host of leads, but none which panned out.
In February 2014, Sunderland killer Steven Grieveson was arrested on suspicion of Nikki’s murder, but he was never charged.
Sharon has previously had support from former senior Durham police officer Lord Brian Mackenzie of Framwellgate, who led the fight for a change in the law which resulted in two men being jailed for their parts in the murder of London teenager Stephen Lawrence.
She hopes he will support her calls for the case to be reinvestigated.
“He has given me a ring to arrange for us to meet up,” said Sharon.
“I have asked if he can come to my home again. I will ask Lord Mackenzie can the Government help me with funding for private investigators and private DNA testing like they did with Stephen Lawrence.
“I understand the police have not got the funds, but there are other cases which are getting funding - Nikki’s is not one.
“Too many things have happened with Nikki’s case that need putting right.
“It has been going on too long.”
Detective Superintendent Christina Barrett said: “Investigations into unsolved murders are never closed and the investigation into the murder of Nikki Allan is still very much ongoing and we will continue to do all we can to identify who is responsible for her murder.
“We continually review the investigation, which began in 1992, and always look to apply new advancements in forensics and technology to the enquiry, as and when they become available.
“We continue to work together with Nikki’s mum, Sharon, to investigate and explore lines of enquiry and we maintain regular contact to keep her updated on the ongoing investigation.
“Although Nikki was killed more than 20 years ago we still continue to appeal for help in solving this murder.
“Anyone with any information is asked to contact police. If any new evidence comes to light this will be investigated.”
To view Sharon’s petition, visit https://www.change.org/p/re-investigate-the-murder-of-nikki-allan-24-years-on-and-still-no-justice