Mary Natoli was an 85-year-old Italian-American woman from Phillipsburg, New Jersey, who had spent a long life rooted in the same small river town where she was born on January 28, 1908. She had worked in a silk mill in her younger years, part of the local industrial rhythm that shaped Phillipsburg in the early and mid–20th century, and in later decades she was known within her family simply as a devoted grandmother, steady and hardworking, the kind of elder relatives remembered for quiet
constancy rather than drama. Her life followed the familiar arc of many first- and second-generation families in that part of New Jersey: church, work, family gatherings, and the same streets and landmarks seen over and over across the decades.
In the summer of the early 1990s, Mary was a patient at Warren Hospital in Phillipsburg, admitted for medical care as age and frailty began to take their toll. On July 23, 1991, she died there, her passing at first appearing to fit the sad but natural pattern of an elderly woman nearing the end of her life. Her family and community mourned as families do in small towns, gathering around memories of a soft-spoken, gentle woman whose working days in the mills were long behind her. She was laid to rest in Saint Philip and Saint James Cemetery in nearby Greenwich Township, the graveyard of a parish that anchors generations of local families. At the time, there was no sense that anything criminal had taken place inside her hospital room; her death blended into the hospital’s steady background of loss.
What no one at Mary’s bedside understood then was that a nurse working in that same hospital, Charles Cullen, had begun using his access to vulnerable patients to commit murders that would eventually make him one of the most prolific serial killers in modern American medical history. Cullen, a registered nurse whose career took him through numerous hospitals in New Jersey and Pennsylvania, later admitted that he killed patients by administering hidden overdoses of powerful drugs, especially the heart medication digoxin. At Warren Hospital, investigators would eventually conclude, he targeted several elderly patients, including Mary, by slipping lethal doses into their systems while they were under his care. Sources that reconstruct his victim list place her death on July 23, 1991, between the fatal poisoning of Lucy Mugavero in March of that year and the killing of Helen Dean later that summer, all at the same hospital.
For years, the pattern behind those deaths remained hidden. In the early 1990s, individual fatalities at Warren Hospital were folded into ordinary hospital mortality statistics, and suspicions did not coalesce around a single staff member in a way that led to charges. Across multiple institutions, Cullen moved from job to job, taking advantage of gaps in oversight and the difficulty of proving criminal intent when patients were already ill. In Mary’s case, as in many others, her death certificate and the family’s grief initially bore no hint that a crime had been committed, and there were no public arrests or named suspects connected to her passing in the years immediately following her funeral.
That changed only after a decade of quiet, when a cluster of suspicious deaths at Somerset Medical Center in Somerville, New Jersey, finally triggered a focused police investigation into Cullen’s conduct. Hospital records, drug-dispensing logs, and the cooperation of a fellow nurse, Amy Loughren, helped investigators trace an unmistakable pattern of unauthorized medication access and unexpected patient collapses. Cullen was arrested in December 2003 and, under questioning, began to admit to a long series of murders stretching back to the late 1980s, including those at Warren Hospital in the early 1990s. Only then did Mary’s name reemerge not as that of an elderly woman who had simply reached the end of her days, but as the victim of a deliberate killing carried out by a nurse she and her family had trusted.
When Cullen was brought into a Warren County courtroom in 2004, he formally pleaded guilty to killing three elderly women at Warren Hospital: Lucy Mugavero, Helen Dean, and Mary Natoli. Prosecutors described how he had secretly administered digoxin to each of them, turning a drug used to steady fragile hearts into a weapon. Asked by the judge whether each overdose was intended to kill, Cullen answered that it was. Family members, including grandchildren of the Warren Hospital victims, sat in court as he admitted to what he had done; one relative remembered her murdered grandmother as the sweetest little lady imaginable, someone who never could have anticipated such an end at the hands of a caregiver. There were no other defendants standing beside him: in the record of Mary’s death, Charles Cullen is the sole identified suspect and the only person ever charged or convicted in connection with what happened to her at Warren Hospital.
Cullen ultimately received multiple life sentences in New Jersey and Pennsylvania, with no realistic prospect of release; he is serving his time in state prison, legally bound to spend the rest of his life incarcerated. For Mary’s family, the knowledge that her death was not natural but engineered by a serial killer came years after they had laid her to rest, rewiring old memories of hospital visits and final conversations. Yet even as her name appears now in lists of victims and timelines of Cullen’s crimes, the longer sweep of her life still reaches back to a mill town childhood, decades of work, and the ordinary loves of children and grandchildren in Phillipsburg. The crime that ended her life is part of her story, but it is only the last chapter of a history that began many years before a nurse with a syringe ever walked into her hospital room.
