Nancy Guthrie Update: Reward More Than Doubles as 'Biological Evidence' Found

The search for Nancy Guthrie makes headway after a mystery donor added £74,167 ($100,000) to the initial reward.

As Nancy Guthrie's abduction marks its third week of investigations, an anonymous donor has stepped up to offer an additional £74,167 ($100,000) for information that solves the case. The amount matches the FBI's separate reward, which itself has doubled from last week's £37,100 ($50,000).

Reward Surges in Guthrie Abduction Case

Per the Independent, Pima County officials have already raised £1,855 ($2,500) in local donations. The mystery donor contacted the county via the local attorney's tip line, 88-CRIME. The reward now totals £150,225 ($202,500), with the Pima County and the FBI's contributions combined.

The sizeable incentive should encourage anyone with 'information leading to the location of Nancy Guthrie and/or the arrest and conviction of anyone involved in her disappearance' to come forward, the FBI said in a statement. 'Since February 1, 2026, the FBI has collected over 13,000 tips from the public related to this case.'

Sheriff Nanos Urges Tips Amid New Evidence

Optimistic, Pima County Sheriff Chris Nanos urged people to keep sending tips. 'Because let's face it, you've been around enough to know that when these tips dry up, this case goes cold,' he said, according to KGUN. 'We believe somebody out there knows who did this. We need that person to call.'

On 7 February, the Guthrie family responded to a ransom demand for Nancy Guthrie's safe return. Different media outlets received a series of ransom notes, none of which provided proof of life. No transactions have been confirmed, but the Guthrie family has repeatedly stated they're willing to pay ransom.

Nanos explained how a single tip could lead to a breakthrough in the case. Tips are ranked priority four to one, the latter most pertinent. 'Here's a level one tip — that video — the doorbell. That would be a great example of a level one tip or maybe it's this backpack has been identified as only purchased at Walmart. That'll be pretty high,' Nanos explained.

The Pima County Sheriff's Office announced Wednesday that it had found new 'biological evidence' not belonging to Nancy Guthrie, per the New York Post. The reveal adds to mounting evidence on the investigation, which has since crossed borders to involve Mexican authorities.

Increased Amount of Tip Calls

Speaking to 13 News, Nanos said his department has received 50% more tip calls from the same period in 2025, because of the Nancy Guthrie case. They tread cautiously in pursuing leads, including those obtained through doorbell cameras and CCTVs.

'The challenge is the fact that there's so much technology out there, it becomes, you have to, one, be careful of the legalities of that technology and how you're using it in the ways you use it,' Nanos said. Serious leads are coordinated between multiple agencies, including the FBI, the U.S. Attorney, and the county attorney.

Pacemaker Tech Fuels Ongoing Search

Nancy Guthrie was last seen at her Tucson home at 9:50pm on 31 January. Backend data from her home's doorbell camera detected odd movements nearby at 1:47am on 1 February, and at 2:28am, her phone app lost track of her pacemaker signal.

Law enforcement is currently using an airborne 'signal sniffer' in hopes of detecting Bluetooth signals from Guthrie's pacemaker, per the BBC. The idea is that even if Guthrie is not carrying her phone or other connected device, the pacemaker itself still sends faint signals that specialist equipment might pick up—helping narrow down her possible location.