The mother of Thomas Devlin today said his family will "wait and see" if a knife found on the Mount Vernon estate yesterday has any link to the brutal murder of the 15-year-old.
Thomas was stabbed to death on Somerton Road, north Belfast, close to his home on his way back from buying sweets with friends in August 2005.
His mum, Penny Holloway, said they were not building themselves up to hope that the knife, found during a search by police in connection with the murder, would lead to his killers.
"We'll just wait and see. We can't allow ourselves to build up hope in this."
Police launched a new appeal for information about the murder on Thomas' anniversary last month.
"We live in hope that something will happen and that people will come forward with information," Ms Holloway said.
The loyalist estate of Mount Vernon - where police believe Thomas's killers were from - is the focus of the police campaign.
Ms Holloway said: "We have been criticised for focusing (in our appeals for information) on Mount Vernon but maybe the fact that the knife has been found there speaks for itself."
When asked about the knife and whether it was being linked with Thomas' murder, a police spokeswoman said: "It would not be appropriate to comment as this is a live police investigation."
It is believed that two men carried out the murder, coming up behind the boys and attacking Thomas and injuring one of his friends. Ms Holloway said the possible development, coming two years after the murder, did not surprise the family.
"Nothing surprises us about this murder, the way things are going," she said.
"We just have to hope that something will turn up that will lead to the two people who killed him. We spent his anniversary with his friends and what we asked them to do was to write down their memories of Thomas and we placed them down where he was killed so that everyone could see them."
Police have questioned several people about the murder but no-one has been charged.