The investigation into the disappearance of 84-year-old Nancy Guthrie, mother of NBC “Today” host Savannah Guthrie, is being spearheaded by a seasoned law enforcement veteran with five decades of experience.

Chris Nanos, the Sheriff of Pima County, Arizona, launched his law enforcement career in 1976 with the El Paso Police Department in Texas. By 1984, he had transitioned to Pima County as a corrections officer and was promoted to deputy the following year.

Over the next 30 years, Nanos honed his skills in tackling violent crimes, sex offenses, and drug interdiction, steadily ascending within the department. In 2012, he was appointed chief of the investigative bureau, and by 2014, he had advanced to chief deputy.

Nanos’s resume, accessible on the Pima County website, highlights his involvement with various law enforcement organizations, alongside his contributions to the community in other roles.

He has previously served as a board member for the Boys and Girls Club of Tucson and was an executive board member at the Southern Arizona Child Advocacy Center.

Pima County Sheriff Chris Nanos, left, speaks at a news conference with the FBI during a briefing at the Pima County Sheriff’s Department in January 2026. (Kelly Presnell/Arizona Daily Star via AP)

On his resume, posted publicly on Pima County’s website, Nanos lists organizations that he is, or has been involved with. Many are law enforcement associations, but he has served the community in other capacities as well.

He was formerly a board member for the Boys and Girls Club of Tucson, and a former executive board member of the Southern Arizona Child Advocacy Center.

His resume also says he has received “repeated recognition for his dedication and community work, to include volunteering for Special Olympics, working with homeowner associations and neighborhood groups.”

In 2015, Nanos was appointed sheriff of the county.

An undated photo of Nancy Guthrie and Savannah Guthrie was provided by NBC in response to the disappearance of the 84-year-old mother of the “Today” show host. (Courtesy of NBC)

He lost an elected bid for the same position in 2016, but ran a successful campaign for the position in 2020. That year, Nanos, a Democrat, won the partisan election by a razor-thin margin, defeating his Republican opponent Mark Napier by only 0.7%.

Four years later, he battled to keep his elected position in an even tighter race, winning 49.9% of the votes against Republican challenger Heather Lappin, who earned 49.8%. His margin of victory was 481 votes, and he was declared the winner several weeks after the election following a contentious recount.

In fact, Nanos’ last election was marred by controversy.

In the weeks leading up his 2024 election, Nanos reportedly placed his opponent Lappin, a lieutenant at the Pima County Jail, on administrative leave, ordering her not to discuss the reasoning for his decision. He did the same to Sgt. Aaron Cross, an outspoken opponent of Nanos and the head of the Pima County Deputies Organization.

Pima County Sheriff Chris Nanos speaks to the media on Feb. 3, 2026, in Tucson, Arizona. He was answering questions about the search for Nancy Guthrie, the missing mother of NBC host Savannah Guthrie. (Jan Sonnenmair/Getty Images)

Cross reportedly campaigned against Nanos, holding a sign on a street corner saying “Deputies Don’t Want Nanos,” just before he was placed on leave. Nanos claimed Cross campaigned against him while wearing his Pima County Sheriff’s uniform in breach of department rules, which Cross denied. Cross later filed a federal lawsuit against Nanos, claiming the sheriff violated his First Amendment rights.

Nanos also reportedly faced a criminal election interference investigation stemming from the matter.

The sheriff has also faced heat for his handling of an internal investigation into a 2022 sexual assault of a female deputy by a supervisor in 2022.

Australian-born presenter, Savannah Guthrie poses alongside her mother Nancy Guthrie during a production break whilst hosting NBC’s “Today Show” live from Australia at Sydney Opera House on May 4, 2015, in Sydney, Australia.  (Don Arnold/WireImage)

In his current role, Nanos oversees 1,500 employees and 400 volunteers, serving more than one million residents in a county that covers about 9,000 square miles.

Nanos and the sheriff’s department did not return requests for comment.

The search for Guthrie is entering its fifth day. So far, little information has been released about the nature of the investigation, and a suspect has not been named.

Law enforcement on Tuesday acknowledged that it was aware of potential ransom notes sent to several media outlets.