Warren County Prosecutor’s Office

The Warren County Prosecutor’s Office entered the book’s account of Charles Cullen through the investigation of Helen Dean’s death at Warren Hospital. Her son’s report connected a tiny injection mark, an unscheduled injection, and the male nurse identified as Cullen to a suspected homicide. The office questioned Cullen, but the medical investigation did not test for digoxin; Helen’s death was ruled natural. The case thus shows both the prosecutor’s office acting on a family member’s accusation and the evidentiary limit created when a crucial poison was not included in the testing.

The Complaint and the Investigation

Helen Dean’s son, Larry Dean, noticed a pinprick on her inner thigh and called her doctor. At first, the mark was treated as possibly a bug bite. The next day, Helen became violently ill; when her heart stopped, she could not be revived. Larry did not accept the death as an unexplained medical turn. Her oncologist confirmed that she had not been scheduled for an injection, and other nurses identified the male nurse she had named as Charles Cullen.

Larry then called the Warren County Prosecutor’s Office. He said his mother had been murdered and identified Cullen as the person responsible. That direct accusation brought the county investigators into a case that had begun with a family’s observations at the bedside. Their work unfolded alongside questioning by the doctor, Warren Hospital administrators, and Cullen’s nurse supervisors. The account identifies two people from the office’s Major Crime Investigation Unit among those who questioned him, establishing the unit as part of the response without detailing its internal structure or assigning individual investigators by name.

The inquiry focused on Cullen’s account of the events and on the physical evidence from Helen’s body. Cullen was asked repeatedly to describe the scenario and denied both the injection and any wrongdoing. He watched as investigators searched his locker. The questioning therefore placed his denial beside a son’s accusation, a reported injection that had not been ordered, and the examination of the small mark on Helen’s thigh.

Forensic Limits and the Official Finding

A doctor from the Medical Examiner’s Office sampled the injection site and tested for nearly one hundred potentially lethal chemicals. The testing did not include digoxin. Helen’s death was consequently determined to be from natural causes, despite the unusual mark and Larry’s complaint that his mother had been murdered. The narrative does not say that the prosecutor’s office caused the omission; it presents the missing test as a decisive limitation in the forensic examination on which the official determination rested.

That limitation shaped what the office could pursue. Cullen was placed on indefinite paid leave by his supervisor, effective immediately, while the investigation continued. The account does not describe an arrest, charge, or finding against him in this case. Instead, it follows the inquiry to a point where the physical clue had been examined but the relevant drug had not been tested for, leaving the death classified as natural. Larry’s certainty and the official ruling thus remained sharply opposed, without the forensic result needed to resolve them.

Interview and Polygraph

After Cullen’s suicide crisis took him through an emergency room, an inpatient psychological hospital, and an outpatient counseling program, the Warren County Prosecutor’s Office was waiting to interview him. He again denied everything. When the questioning ended, investigators brought in a polygraph and connected him to the machine. Its inked needles recorded changes on graph paper, including variations in pulse and rhythm.

The book emphasizes the gap between what the test registered and what Cullen understood about the bodily signals being measured. As a nurse, he knew that heart rhythms could be altered by drugs including digoxin, beta blockers, and nitroprusside. The investigators, by contrast, were interested in basic changes in pulse and rhythm as indicators of truth. Cullen passed the polygraph. He considered the test crude, but believed the investigators probably knew the truth anyway. The episode records the office’s use of the test and its result, not a confession or a demonstrated resolution of Helen Dean’s case.

Significance and Outcome

The office’s investigation occupies an uneasy space between suspicion and proof. Larry supplied a specific accusation, the medical record offered no scheduled injection, and the examination found a pinprick; yet the testing omitted digoxin, and the official cause remained natural. Cullen’s repeated denials and polygraph result added procedural steps but did not, in the account provided, convert the suspicion into a prosecutable conclusion.

The consequences for Cullen were immediate but limited: he was put on paid leave, later went through a suicide crisis, and ultimately decided not to return to Warren Hospital. He found work at Hunterdon Hospital by April 1994, with Warren Hospital and Saint Barnabas Medical Center listed as potential references. The narrative does not attribute his departure or subsequent employment to a prosecution by the Warren County Prosecutor’s Office. Its role in this episode is instead defined by the complaint it received, the questioning it conducted, and the boundary imposed by an inconclusive forensic examination.