Feb 1, 2026 – Nancy Guthrie, 84, disappears from her Catalina Foothills home after missing a virtual church service; blood later confirmed on her front porch indicates a violent incident [10].

Feb 3, 2026 – Pima County investigators deploy Parsons Corp.’s BlueFly handheld scanner, providing heat‑map data to helicopters, ground vehicles and foot teams to help locate Guthrie’s pacemaker signal [4].

Feb 10, 2026 – The sheriff’s office releases grainy Nest doorbell footage showing a ski‑masked man covering the camera with a gloved hand, wearing a black 25‑liter Ozark Trail backpack and an unusual waist‑holstered gun; the suspect is estimated at 5 ft 9‑10 in with an average build [3][10].

Feb 13, 2026 – Police seize a gray Range Rover parked near Guthrie’s residence, covering it with a tarp for forensic analysis; former FBI agent Jennifer Coffindaffer calls the vehicle “Number One” lead in the case [6].

Feb 18, 2026 – DNA from a glove found two miles from the home and from the residence yields no CODIS matches, prompting a shift to investigative genetic genealogy [1][4][11]; the FBI raises its reward to $100,000 and contacts Mexican authorities to explore cross‑border leads [9]; a helicopter‑mounted signal sniffer begins scanning for Bluetooth emissions from Guthrie’s pacemaker [9]; Savannah Guthrie posts a video urging the kidnapper to surrender, saying, “It is never too late to do the right thing… we believe in the essential goodness of every human being” [1].

Feb 19, 2026 – Sheriff Chris Nanos announces the department will submit the glove DNA to open‑access genealogy databases (GEDmatch, FamilyTreeDNA), citing recent successes in solving the Golden State Killer, Idaho student murders and a 1921 Tulsa Race Massacre victim [2]; DNA‑justice CEO CeCe Moore warns a likely legal battle over broader database access [2].

Feb 20, 2026 – Authorities publicize multiple Bitcoin ransom notes, though one suspect is later charged with a false threat unrelated to the disappearance [3]; a private donor adds a $100,000 reward, matching the FBI and sheriff’s offers [3]; ex‑FBI agent Coffindaffer outlines seven factors indicating the case is unlikely cartel‑linked, such as the absence of a ransom demand and the remote location [8].

Feb 21, 2026 – The probe enters its third week, logging over 30,000 tips and deploying hundreds of officers while officials say they are not ruling out multiple perpetrators and continue reviewing nearby camera footage [7]; Coffindaffer reiterates the seized Range Rover as the top lead and urges the public to submit actionable tips [6].

Feb 23, 2026 – Volunteer searchers locate a black Ozark Trail backpack near Guthrie’s home on Orange Grove Road and turn it over to deputies, reinforcing the backpack seen in the Feb 10 video; the sheriff’s office asks unsanctioned groups to cease independent searches and join official volunteer efforts [5].

2026 onward (ongoing) – Investigators continue DNA analysis of the seized Range Rover, pursue genealogy matches in open databases, collaborate with Walmart to trace the backpack’s purchase, maintain the $100,000 reward, and keep the signal‑sniffer operation active in hopes of locating Guthrie’s pacemaker [6][9][2].