A neighbor of 84-year-old Nancy Guthrie has revealed an unusual FBI mix-up that left her family “terrified” and raised questions about early coordination in the investigation.

The incident prompted retired FBI agent Maureen O’Connell to share advice for neighbors and families on staying safe during complex investigations, while it has been claimed the suspects may have gained access to her home using a common technique.

O’Connell, speaking on the Brian Entin Investigates Podcast, firstly stated she would not be revealing too much as “bad guys could learn from it.” She then highlighted the need to verify identities and exercise caution, while a mystery man who claimed he “saw Nancy 5 days ago” offered chilling new proof.

“Someone should either be obviously identifiable and or show their identification. So, FBI agents don’t have uniforms per se. We do wear our raid jackets and we do have our credentials. So, an FBI agent will be happy to show them to you if your interaction would deem so,” she said.

The mix-up took place soon after Nancy disappeared from her Tucson, Arizona home in the early hours of February 1.

Speaking to Entin, Aldine Meister, a longtime neighbor, described a strange visit involving her sister.

“They went to my sister’s house on the second Friday night after Nancy went missing at like 7:30 at night, it was raining, with hoodies on, black hoodies, and they were tapping on her windows and frantically ringing her doorbell,” Aldine said.

Believing the visitors were part of the official search, her sister let them inside. “She was alone and was like, ‘Sure, of course. You’re the FBI,’” Aldine recalled. One of the individuals kept his hood up and barely spoke, which unsettled her sister.

“The guy didn’t really speak and he kind of creeped her out,” she added. After about 20 minutes, the pair left, leaving the family uncertain about who they were.

The situation escalated when family members contacted authorities, prompting a fast response. “Within 10–15 minutes there were seven police cars, four FBI agents, and they said it wasn’t the FBI. She was terrified,” Aldine said.

O’Connell noted the unusual nature of the encounter. “I would be absolutely gobsmacked if they did not show her their credentials, at least one of them. That’s our protocol. That’s what we do. It’s not something that people see often. So, it’s something she might easily forget, especially if, as her sister said, she’s very nervous to begin with.”

Investigators went on to collect DNA samples and dust for fingerprints, treating the home as a potential crime scene.

The next day brought clarification. Officials told the family, “Oh yeah, by the way, that woman was an FBI agent. We don’t really know who the guy was, but she was, so you’re fine.”

Aldine said the episode highlighted early communication issues. “I think in the beginning the two entities weren’t talking to each other properly. I think the FBI and the sheriff’s department were not communicating.”

Nancy has now been missing for six weeks. Despite local and federal efforts, no suspects have been identified. Her family has offered a $1 million reward for information leading to her safe return. O’Connell advises neighbors to stay vigilant, verify identities, and carefully oversee anyone entering homes of vulnerable adults. It comes after the Guthrie search took a shock twist with cadaver dogs – and an alarming explanation is emerging.