Scanned photo of JonBenet Ramsey from John Ramsey’s personal Ramsey family collection (Discovery+)

BPD Chief Stephen Redfearn is the fifth police chief to take on the case since 1996, and he was officially appointed in September after serving as the interim chief for the Boulder Police Department starting in January. BPD detectives have followed up on more than 21,000 tips, emails and letters and traveled to 19 states to interview or speak with more than a thousand people in connection with the case.

“The killing of JonBenet was an unspeakable crime and this tragedy has never left our hearts,” Redfearn said in a November statement reflecting on 28 years since JonBenet’s murder. “We are committed to following up on every lead and we are continuing to work with DNA experts and our law enforcement partners around the country until this tragic case is solved. This investigation will always be a priority for the Boulder Police Department.”

JonBenet Ramsey, right (Ramsey family)

Local authorities have partnered with federal officials — including the FBI — and DNA experts from across the country, according to a November update from the Department.

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.