Investigators in southern Arizona are now asking residents living near Nancy Guthrie to review and submit any home surveillance footage from the weeks leading up to her disappearance.

The Associated Press reports that the Pima County Sheriff’s Department said Thursday that the request was sent to neighborhoods within a 2-mile (3.2-kilometer) radius of Guthrie’s home, where the 84-year-old vanished 12 days ago. Officials are seeking video dating back to the start of January and asked residents to share recordings of “anything neighbors deem out of the ordinary or important to our investigation.”

Federal and local authorities have been canvassing Tucson-area neighborhoods near Guthrie’s home, as well as the nearby residence of her other daughter, which Guthrie visited just hours before she disappeared. Investigators said they have already collected and are reviewing multiple items of evidence, including a pair of gloves.

On Thursday, authorities briefly erected a tent at the front of Guthrie’s home, where blood was found early in the investigation. That location is also where a doorbell camera captured images of a masked individual on the night Guthrie went missing. The Federal Bureau of Investigation released new details about that individual Thursday, now identifying the person as a suspect in a post on X.

According to the post, the suspect is described as a 5-foot-9-inch or 5-foot-10-inch male with an average build. The FBI also shared images showing a black, 25-liter “Ozark Trail Hiker Pack” backpack, which investigators said matches the brand and model worn by the suspect.

“We hope this updated description will help concentrate the public tips we are receiving,” the FBI said, noting that thousands of tips have been submitted since Guthrie disappeared.

FBI Phoenix also announced Thursday that the reward for information leading to answers in the case has been increased to $100,000.

Authorities have previously stated that Guthrie was taken against her will. She has been missing since Feb. 1, and investigators have warned that she relies on several medications, raising fears she could die without them.

On Wednesday, two investigators were seen exiting the home of Guthrie’s daughter Annie carrying a paper grocery bag and a white trash bag. One investigator, still wearing blue protective gloves, also removed a stack of mail from the home’s roadside mailbox.

A neighbor identified as Adams said she noticed an uptick in activity earlier this week while walking her dog. “It started to get really busy and then I heard about them searching, looked down the street, I saw them slowly moving this way,” she said.