The Coconino County Attorney’s Office announced the formation of a new Cold Case Unit on Monday. The unit will be staffed by prosecutor Jonathan Mosher, paralegal Maisie El-Ters and paralegal assistant Vanessa Arcuri, who will work cooperatively with law enforcement agencies across the county to review and prosecute unsolved criminal cases.

In a press release, County Attorney Ammon Barker said, “We are determined to ensure that every case, regardless of how long ago it happened, deserves justice. Our Cold Case Unit reflects our unwavering commitment to work as a team with partners at the Coconino County Sheriff’s Office, the Flagstaff Police Department, and other local law enforcement agencies to solve cases and bring violent criminals to justice.�

This is not the first Cold Case Unit established in Coconino County: the county sheriff’s office has operated its own unit since 2008, primarily staffed by retired law enforcement officers volunteering their time.

In an interview, Barker said the formation of the new unit in his office would bring increased collaboration to those efforts and ensure there’s adequate staffing for the work required.

“Those cases were being reviewed and investigated by these volunteers, but our office wasn’t really involved in the conversation,� Barker said. “What we’re trying to do now is have our prosecutor involved in the conversation much earlier.� The process of reviewing the entirety of an old case, he noted, “takes so much more time than you’d think.�

The attorney’s office will not be independently investigating cases, Barker said -- though he hopes to secure additional funding in the future, either locally or through federal sources, to hire a full-time investigator dedicated to cold cases.

“It’s just the nature of police work that the thing that comes in the door today is going to take priority over the case that happened 10 years ago,� Barker said. “Unless you have some kind of dedicated personnel � it becomes harder and harder to keep those fresh, and keep those cases moving.�

For the moment, the Cold Case Unit at the attorney’s office will rely on law enforcement personnel to bring forward cases that are potential candidates for new criminal charges. Barker praised the Coconino County Sheriff’s Office and Flagstaff Police Department for the energy they’ve already put into reevaluating old investigations.

That commitment, he said, “prompted us to meet the need that we’re seeing right now.�

In 2016, the unit with the sheriff's office successfully identified the remains of Brian Nez, a 19-year-old Native American man who was struck and killed by a car outside Winslow in 1994. Five years later, the unit was able to identify Carolyn Eaton, long known as “Valentine Sally,� after her body was discovered off of Interstate 40 on Valentine’s Day in 1982. Investigators said they believe her death may have been a homicide, but no perpetrator has been identified to date.

And in 2023, DNA analysis led to the identification of a body found in a shallow grave off of Highway 180 three years prior: David Wilkinson, who the Coconino County Medical Examiner’s Office believed had been murdered. As in Eaton’s case, no suspect has been identified.

“The formation of the Cold Case Unit is an important step in ensuring that justice is not delayed or forgotten,� Coconino Sheriff Bret Axlund said in a press release. “We’re committed to leveraging our expertise and working together with the county attorney’s office to reexamine every piece of evidence and investigate every lead. This collaborative approach strengthens our ability to solve these cases.�

In the same release, Flagstaff Police Department Chief Sean Connolly said, “We are deeply committed to seeking justice for those impacted by these unsolved crimes. This Cold Case Unit brings together the right people, resources and technology to reexamine the evidence and provide the families of victims the answers they deserve.�