The Star can reveal the person nominated was associated with two men who were investigated for potential involvement in Kirsty’s murder but later ruled out.
The nominated person had not featured in the police investigation until the reward was posted in July.
The two men initially suspected were not Kirsty’s father Sid or brother John, who police focused on for a number of years.
Detective Inspector Greg Murton, who is investigating the cold case, yesterday said he would not comment about The Star’s information. It would be unhelpful to the investigation, he said.