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U.S. News · 6 min read

Geofencing Technology Solves Paso Robles Murder Mystery

A California woman’s disappearance baffled investigators for months until digital evidence and DNA led to a breakthrough in the case.

Nancy Woodrum was the kind of person who left a mark on everyone she met. Friends recall her warmth, her generosity, and the way she made people feel truly seen. As the owner of a hair salon in Paso Robles, California, and a devout Jehovah’s Witness, Nancy had built a life centered on family, faith, and community. But in May 2018, that life was tragically cut short, and the mystery of her disappearance would spark a months-long investigation that ultimately relied on cutting-edge technology to deliver justice.

Born Nancy Colleen Vestal on September 5, 1955, in Los Angeles, she married Robert Woodrum in 1977. Together, they raised four children—Amanda, Chad, Christopher, and Amy—though heartbreak struck early with the loss of Christopher in infancy and Amy in 2005. After Robert’s passing in 2012, Nancy found herself living alone at her beloved Victorian-style Paradise Ranch, where she continued to welcome guests and maintain close ties with her remaining family.

On May 5, 2018, Nancy’s daughter, Amanda Peel, grew worried when her mother didn’t show up for her Bible study group. Nancy was always punctual, especially for religious commitments. Amanda called a neighbor to check on her mother. The neighbor’s report was chilling: the door to Paradise Ranch stood wide open, the TV was blaring, and Nancy was nowhere to be found. Amanda rushed over and discovered a scene that sent alarm bells ringing—blood spatter in the bedroom and missing bedsheets. It was clear that something terrible had happened.

Police were called immediately. Soon after, Nancy’s bedding and clothes were found discarded along a nearby highway, just miles from her home. Investigators began combing through possible suspects, considering everyone from recent weekend guests and a contractor to even members of Nancy’s own family. Yet, each lead fizzled out, and the case stalled for more than seven months.

According to ABC News, the investigation took a dramatic turn when authorities turned to geofencing—a relatively new technology at the time. Prosecutor Chris Peuvrelle explained, “You can put a fence, a virtual fence around an area, a house, a property, and Google will track which Google accounts, emails or cell phones come within that fence in a given period of time.” By securing a search warrant, investigators could pinpoint which devices had been near Paradise Ranch on the night Nancy vanished.

This digital dragnet led them to Carlo Fuentes Flores, a member of a painting crew that had recently worked at the ranch. Investigators discreetly followed Fuentes Flores, eventually collecting his DNA from a Coke bottle he discarded at a restaurant. When tested, it matched the DNA found in Nancy’s bedroom. Armed with this evidence, police brought him in for questioning.

During the interrogation, Fuentes Flores made a chilling confession. He admitted to sexually assaulting Nancy while intoxicated and suffocating her with a pillow to cover up the assault. He even led authorities to a remote area known as Carrizo Plain, about an hour from Paso Robles, where Nancy’s skeletal remains were recovered on December 18, 2018. As reported by The Cinemaholic, the evidence confirmed that Nancy had been both physically and sexually assaulted.

Despite his confession, Fuentes Flores later pleaded not guilty. His defense argued that his admissions should be thrown out because he hadn’t been provided a Spanish translator during the police interview, given that Spanish was his first language. Still, the mountain of evidence—including the DNA match and his own directions to Nancy’s remains—proved insurmountable. In February 2022, Fuentes Flores was found guilty of first-degree murder during a rape and sentenced to life in prison without the possibility of parole. His appeal, which hinged on the translator issue, was denied by the California Court of Appeals in July 2023.

Throughout the ordeal, Nancy’s family and friends clung to memories of her kindness and faith. Amanda Peel told ABC’s “20/20,” “There was relief. I just wanted to find her. We needed to have some closure. There’s a lot of people who never get answers.” She added, “She was an amazing person. She loved God. She wanted that to be first in her life. And she wanted people to know that.”

The case of Nancy Woodrum stands out not only for its heartbreaking details but also for the way technology played a pivotal role in solving it. Geofencing, once a novel investigative tool, proved decisive. By identifying which cell phones had been near Paradise Ranch during the critical window, investigators could zero in on a suspect who otherwise might have escaped justice. As prosecutor Peuvrelle noted, the ability to draw a digital boundary around a crime scene and see who entered it during a specific time period was a game-changer for law enforcement.

Yet the use of such technology also raises questions about privacy and due process. In this case, geofencing required a search warrant and was used in a targeted, time-limited way. Still, as law enforcement agencies increasingly turn to digital tools, debates continue about how to balance investigative needs with civil liberties. For Nancy’s family, though, the technology brought long-awaited answers and a measure of closure.

It’s also a stark reminder of the tenacity required in missing persons cases. The initial investigation looked at guests, contractors, and even family members, but none fit the bill. Only when the case seemed to have gone cold did a new approach—one rooted in the digital footprints we all leave behind—break it wide open.

For the Paso Robles community, Nancy’s death was a devastating loss. She was more than just a salon owner or a neighbor at Paradise Ranch; she was a friend, a mother, and a woman of deep faith who had already endured more than her share of tragedy. Her story is now a cautionary tale about vulnerability and the lengths to which investigators must sometimes go to find the truth.

As Amanda Peel and those who loved Nancy remember her, they take comfort in knowing that her story, though marked by sorrow, also showcases the power of persistence—and the hope that even the darkest mysteries can one day be solved.

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