The committee, which included investigators from several state and federal agencies, met in 2009 after police took the lead in the case back from Boulder County prosecutors.
Members reviewed evidence in the death of 6-year-old JonBenet, whose body was found bludgeoned and strangled in her family's home in Boulder on Dec. 26, 1996. Former District Attorney Mary Lacy said in 2008 that evidence suggests the killer was an unknown stranger, not a family member.
Police Chief Mark Beckner wouldn't reveal details about the continuing investigation or who police want to interview now.
"We continue to work the Ramsey case and have tailored our investigation based on recommendations from our 2009 advisory committee," Beckner told the Camera newspaper. "This has included additional contacts and interviews with those who may have information pertinent to the case."
JonBenet's older brother Burke, who was 9 when JonBenet died, was contacted by police but hasn't been interviewed yet, Ramsey family attorney Lin Wood said.
"I understand that they met with Burke and gave him a card and said, 'If you want to talk to us, here's how you would contact me,"' Wood said. "But the police have not interviewed Burke."
JonBenet Ramsey's mother, Patsy, died of cancer in 2006. Her father, John, made a public plea last December for people to share any suspicions they had around the time JonBenet died.
"Whatever the reason for any type of approach with Burke, it would have nothing to do with the case other than with the reality that John and Burke could help the Boulder police as witnesses in the investigation," Wood said. "For all I know, they have gotten some tip and think Burke could give them some information."
Denver defense attorney and legal analyst Scott Robinson said it would be premature to assume that police have new information.
"But it would be absolutely accurate to say they're not letting this case lie," he said.
Information from: Daily Camera