“The killing of JonBenét was an unspeakable crime and this tragedy has never left our hearts,” Boulder Police Chief Steve Redfearn said.

Police in Boulder, Colo., shared an update last week on the cold case murder of 6-year-old JonBenét Ramsey as the 28th anniversary of her killing approaches.

On Tuesday, Nov. 26, the Boulder Police Department provided its annual update on the ongoing homicide investigation.

“The killing of JonBenét was an unspeakable crime and this tragedy has never left our hearts,” Boulder Police Chief Steve Redfearn said in the post on X, formerly Twitter.

“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.”

The beauty pageant queen’s Dec. 26, 1996, killing has made its way back into the spotlight following the November release of the Netflix three-part docuseries Cold Case: Who Killed JonBenét Ramsey?.

The docuseries goes in-depth into what JonBenét’s father, John Ramsey, considers to be missteps made by authorities when investigating JonBenét’s murder amid an international media frenzy he believes only made things worse.

He recently told PEOPLE he is speaking out in part to encourage someone to come forward with new information and to “put pressure” on police to use advances in DNA technology and genetic genealogy to finally catch JonBenét’s killer.

Today, John says he would like state-of-the-art labs that use genetic genealogy and other advanced DNA technology to crack the cold case by examining seven items from the crime scene that he says have never been tested or were examined with outdated methods.

The evidence also includes a ransom note found in the home and a suitcase found under an open basement window where some believe the killer entered and exited the residence.

“We’re begging the police to engage,” he recently told PEOPLE. “There are cutting-edge DNA labs that want to help and who believe they can move the case forward.”

However, in the department’s statement, police said “the assertion that there is viable evidence and leads we are not pursuing — to include DNA testing — is completely false.”

“Additionally, it was the Boulder Police Department — not the Colorado Bureau of Investigation — who convened the Cold Case Review Panel in December 2023 as part of its investigation efforts,” the statement added.

JonBenét was found beaten, sexually assaulted and strangled to death in the family’s basement. Her death was ruled a homicide and John, along with his wife Patsy, quickly became persons of interest, a police claim amplified by the media. Their son, Burke, who was 9 at the time of his sister’s murder, also fell under suspicion. Nobody in the Ramsey family has ever been charged in connection with the case.

In a nearly six-minute video published to the department’s page on X, Chief Redfearn admitted “there were a number of things that people have pointed to throughout the years that could’ve been done better and we acknowledge that is true,” adding that investigators are committed to finding JonBenét’s killer.

The chief also said in the video that investigators have had “ongoing conversations” with JonBenét’s family as recently as mid-2024 and are committed to continuing to communicate.

“We believe Chief Redfearn’s video statement that we released last week speaks for itself,” Boulder Police Public Information Officer Dionne Waugh said in a statement shared with PEOPLE on Monday, Dec. 2.

“It’s obvious that the Boulder Police Department wants to solve this case and the only reason is to bring justice to the victim JonBenét Ramsey.”

Police are asking anyone with information on the case to contact detectives at [email protected] or by calling the Boulder Police tipline at 303-441-1974.