Federal agents are reviewing DNA recovered from Nancy Guthrie's Tucson home as the investigation into her disappearance continues to move forward.
The material was sent to the FBI after a private laboratory working with the Pima County Sheriff's Department examined it and found it needed more advanced testing. Officials have said the sample appears to include DNA from more than one person, which makes the analysis slower and more complicated.
Pima County Sheriff Chris Nanos has said investigators may need months to fully sort through the evidence. He also said multiple labs are helping with the case, while roughly two dozen investigators from local and federal agencies remain involved, according to TMZ.
The new testing follows earlier forensic work that has not led to a public match. A glove found near Guthrie's home produced DNA, but authorities said it did not match anything in the FBI's CODIS database. Later reporting said one person connected to that sample was cleared after investigators determined the profile was unrelated to the case.
Guthrie was last seen on the night of Jan. 31, 2026, after being dropped off at her home in the Catalina Foothills area outside Tucson. Her doorbell camera went offline at 1:47 a.m., and her pacemaker stopped sending signals to its monitoring app at 2:28 a.m. Investigators also confirmed that the blood found on her front porch belonged to Guthrie, the New York Times reported.
Authorities have said the person seen in the doorbell video was masked, carried a backpack, and appeared to interfere with the camera. The FBI has recovered additional images in the case, but no suspect has been named publicly.
The FBI is offering a $100,000 reward for information leading to an arrest and conviction, and Guthrie's family has offered up to $1 million for information that leads to her safe return, as per SAN.
