Progress is being made in the investigation into the unsolved murder of 6-year-old beauty queen JonBenét Ramsey, those briefed on the investigation told ABC News.

JonBenét was killed in her home in Boulder, Colorado, in December 1996.

In the last years, a multi-disciplinary team of experts has been assembled to go through the remaining evidence and apply the most modern scientific and cold-case techniques to try to solve the crime, the sources said. The team has consulted with top experts in their fields, the sources said.

It remains to be seen whether there will ever be enough provable information and evidence to support charges.

This is a developing story. Please check back for updates.