A neighbor of Nancy Guthrie said she spotted a man who "didn't fit" in the neighborhood weeks before Guthrie's disappearance.
The neighbor, who is only identified as Aldine, spoke about what she saw on Brian Entin Investigates.
"He was in kind of street clothes, not shoes that you'd walk in and he had a baseball hat really low, and he was kind of hunched over, and he was kind of looking around, and he just didn't fit," she said.
"And he wasn't going terribly quickly, like a normal person that's getting exercise. He was kind of going slowly, and when he walked by this street he really took a long look at it. I noticed that."
Nancy Guthrie, the 84-year-old mother of Today show co-anchor Savannah Guthrie, has been missing for over a month. Her disappearance prompted a multiagency search involving local law enforcement and the FBI. She was last seen at her home in the Catalina Foothills neighborhood of Tucson, Arizona, on January 31.
Alleged ransom notes were sent to multiple news outlets after she disappeared.
Pima County Sheriff Chris Nanos said at a news conference last month that there were clues at the crime scene indicating that she "did not leave on her own." He also said Guthrie needs daily medication, and it could be fatal if she does not take it every 24 hours.
Nanos told the BBC that he believes Guthrie was a victim of a targeted kidnapping.
Aldine told Entin that she saw the unknown man through her bathroom window about two weeks before Nancy disappeared. "I noticed this strange guy with his hat down really low," she said.
She said he was not dressed in typical walking or hiking gear. "I thought that was weird because that's not normal," Aldine said.
Aldine said she told her husband and mother about the sighting. She said she typically knows the people walking around the neighborhood.
"I think once maybe 12 years ago, I saw a strange guy," Aldine said.
She said she also told the FBI about what she saw. She said she could not make out his face.
"It freaked me out, and I'm not one of those people to be super freaked out by that, but I was like, 'that's weird,'" Aldine said.
Savannah Guthrie, on Instagram: "We feel the love and prayers from our neighbors, from the Tucson community and from around the country. Please don't stop praying and hoping with us. Bring her home."
Timothy Courchaine, U.S. attorney for the District of Arizona, in a statement: "The United States Attorney's Office, together with the FBI and every other law enforcement agency involved in finding Nancy, will go anywhere, do anything, and persevere always to find her."
Anyone with information is asked to contact 1-800-CALL-FBI, 520-351-4900, 88-CRIME or visit tips.fbi.gov. The FBI is offering a reward of up to $100,000 for information leading to the recovery of Guthrie and/or the arrest and conviction of anyone involved in her disappearance.
"To help keep the tip line available for actionable investigative law enforcement leads, please submit only serious and detailed fact-based information, no well-wishes or case theories. The tip line is not for personal messages to the Guthrie family," FBI Phoenix said.
Additionally, 88-CRIME is offering a reward of $102,500 for the arrest of the person or persons involved in the disappearance.
Savannah Guthrie announced on Instagram that the family is also offering a reward of up to $1 million, payable only for her mother's recovery.