Savannah and Nancy Guthrie
Savannah and Nancy Guthrie Facebook/Savannah Guthrie

The investigation into the disappearance of 84-year-old Nancy Guthrie has entered a new phase after forensic analysis of blood evidence found at her Arizona home suggested she may have been alive when she was removed from the property.

Maureen O'Connell, a retired FBI special agent who has reviewed details of the case, told Brian Entin Investigates blood droplets discovered on the porch of Guthrie's residence in the Catalina Foothills show signs of 'aspiration'. The pattern indicates the blood may have come from breathing or coughing, suggesting Guthrie was likely still alive, though possibly unconscious, when she was taken from the home on 1 February 2026.

Authorities have not publicly confirmed those conclusions but say forensic evidence collected at the scene is still being analysed as the search for Guthrie enters its sixth week. Investigators have not identified any suspects and the case remains an active missing-person investigation.

Blood Spatter Evidence

Investigators also noted the absence of 'voids' or footprints in the blood spatter patterns on the porch. Such marks typically appear when someone moves through blood evidence, but none were identified at the scene.

The droplets appear circular and evenly spaced, indicating the blood likely fell vertically. The pattern is consistent with the possibility that Guthrie's head tilted while she was being carried from the house. DNA testing later confirmed that the blood droplets recovered outside the residence belonged to Guthrie.

The Pacemaker Connection and Digital Evidence

Another unusual development in the case involves a reported encounter with a neighbour shortly after Guthrie disappeared. According to local reports, a man and a woman wearing black hoodies approached a nearby home claiming to be with the FBI and asked the resident whether she had a pacemaker.

Federal officials later confirmed that the woman involved in the visit was a legitimate FBI agent, but authorities said they were unable to identify the man who accompanied her. Investigators have not explained why the pair asked about a pacemaker.

Detectives are also examining digital signals from Guthrie's medical device. Investigators believe the likely timeline of the disappearance may fall around 2:30am, when her Bluetooth-connected pacemaker reportedly stopped transmitting data, providing a potential window for when the incident occurred.

Current Search Status

Investigators are also examining several additional clues that emerged in the weeks surrounding Guthrie's disappearance. A neighbour reported seeing a man wearing a baseball cap and dark clothing moving slowly along the street on 11 January, appearing to study houses in the area. Authorities have asked residents to review doorbell camera footage from that date as part of the investigation.

In a separate development, an Arizona couple reported discovering blood-stained gloves and a rock with dried blood in desert terrain roughly a mile from Guthrie's home. Investigators collected the items for forensic testing, although early DNA analysis reportedly did not match samples recovered from inside the residence.

Agency Coordination

The Pima County Sheriff's Department continues to lead the investigation with support from federal agencies. Officials say detectives are analysing forensic evidence, surveillance footage and digital records as they attempt to determine what happened inside Guthrie's home.

The Guthrie family has continued to appeal for information that could lead to her safe return and has offered a $1 million (approximately £750,000) reward for information leading to her recovery. Investigators say the absence of any confirmed 'proof of life' more than five weeks after her disappearance remains a serious concern.