JonBenet Ramsey’s father, John Ramsey, met with Boulder Police Department Chief Stephen Redfearn on Monday to discuss the 6-year-old’s unsolved 1996 murder case.

Twenty-eight years have passed since JonBenet was found strangled and bludgeoned to death in the basement of her family’s Boulder, Colorado home on Dec. 26, 1996, and her killer remains unknown.

“We can confirm that Chief Redfearn and members of our Operations Division met with the family this week as the department has previously to share updates on the case,” a Boulder PD spokesperson told Fox News Digital. “Beyond that we cannot answer specific questions because this is an active and ongoing homicide investigation.”

John Ramsey told Fox News Digital about his plans to meet with Redfearn in December and noted that he meets with Boulder police at least once per year to discuss updates in the case.

“DNA is pretty complicated stuff. I have learned that,” Ramsey said, “but that’s the reason that needs to be retested. That’s the one step that we’re asking the police to do is engage one of these one or two cutting-edge labs in the world and see what we come up with … and we come up empty-handed, then I’ll say, ‘Thank you. You tried. That’s the best we can do right now with today’s technology. Thank you.’ But until we do that, we haven’t done everything that could be done.”

John Ramsey wants DNA to be retested in his daughter’s murder case. (Netflix)

Officials have sorted through 2,500 pieces of evidence and approximately 40,000 reports with more than a million pages documenting the investigation. The Colorado Cold Case Review team has also provided BPD with a list of tips for the department to pursue, according to Redfearn.