Somerset County Prosecutor’s Office Murder Investigation of Cullen

The Somerset County Prosecutor’s Office Murder Investigation of Cullen is the unfolding effort to determine whether a series of unexplained patient emergencies at Somerset Medical Center were deliberate poisonings and whether Charles Cullen was responsible. It begins with a death that appears to Tim Braun to be an ordinary, perhaps politically sensitive hospital call; it soon becomes a time-critical inquiry into six abnormal patient incidents, a suspect with a troubling employment history, and a trail of evidence the hospital’s own investigation has failed to preserve or explain.

From a Hospital Death to a Pattern

On October 3, 2003, Somerset County Prosecutor Wayne Forrest called Braun, then working Major Crimes for the Somerset County Prosecutor’s Office. Braun initially suspected that the death might involve a well-connected person whose status had brought the police into the hospital. Four days later, Forrest sent Braun and his new partner, Danny Baldwin, to meet Somerset Medical Center administrators. The conference room gathering, and the lawyer who explained that the hospital was not reporting a homicide exactly, made clear that the call was more complicated than Braun had assumed.

Somerset’s counsel, Paul Nittoly, described five months of unexplainable patient incidents in the Critical Care Unit, followed by a sixth incident the previous Friday. Senior vice president William Cors read out the six names: Joseph Lehman, Frances Kane, Jin Kyung Han, Reverend Florian Gall, Francis Agoada, and McKinley Crews. Crews had died only four days earlier; five of the six patients were dead. Cors described abnormal laboratory findings and life-threatening symptoms, while stopping short of saying that the cases were connected. The hospital had conducted an internal investigation for five months without identifying a source.

For Braun, the presentation offered neither a conventional crime scene nor a clear account of cause and effect. His notes contained unfamiliar medical terminology alongside the words Insulin, Glucose, and Digoxin. The distinction between an alarming pattern and a provable homicide became the investigation’s first defining problem: the patients’ cases were being described as incidents and unexplained medical occurrences, not confirmed crimes.

Building a Case Without a Crime Scene

Braun and Baldwin had to translate clinical events into investigative leads. Their initial search for Edward Allatt, a phlebotomist connected to the case, produced no criminal record or other useful hit in motor-vehicle, national, or state court databases. The search led nowhere, leaving the detectives with a high-pressure case and no obvious suspect to pursue through ordinary records.

The investigation’s position changed when Braun entered Charles Cullen’s name into a database. Cullen had a criminal record and a checkered nursing work history, including several hospitals that had fired him over nursing-practice issues. Baldwin told Mary Lund that Cullen was a strong person of interest and requested mortality figures for the wards where Cullen had worked, along with his work schedule. Lund said the hospital would monitor Cullen closely while he was on shift, but watching him was not enough: the investigators still needed a way to connect him to the Somerset incidents.

The weakness was not simply a lack of medical expertise. Somerset Medical Center’s five-month internal inquiry had yielded four pieces of paper and no answers. Administrators could not provide the Pyxis automated medication dispensing system records the detectives needed, and there were no interviews or physical evidence to work from. The evidence linking Cullen to incidents at other hospitals was circumstantial; at Somerset, the detectives had no evidence against him. Even the patients’ status as victims remained legally uncertain because the abnormal laboratory results could be contested.

Jurisdiction, Records, and the Risk of Delay

The investigation repeatedly encountered institutional boundaries. Somerset Medical Center had notified state medical departments as well as police, but Baldwin’s calls to the New Jersey Department of Health and Senior Services produced little beyond confirmation that its inquiry had found issues at the hospital. The agency would not share further information without a subpoena, and its investigation had been referred to another health-services body. What might be useful to a homicide inquiry was being handled, at least in part, as a regulatory or licensing matter.

A related dispute over responsibility surfaced in exchanges involving Bruce Ruck and Steven Marcus of the New Jersey Poison Control Center. Ruck and Marcus believed the pattern of patient incidents required a legal investigation and warned that delay could expose more patients to harm. Somerset did not promptly return Ruck’s calls. Across the investigation, the insistence that the matter belonged with police met the hospital’s cautious, noncommittal handling of the incidents. The division of professional authority did not resolve the uncertainty; it prolonged the time before information could be assembled into a criminal case.

Braun therefore proposed expanding the inquiry beyond the small Somerset County Prosecutor’s Office. The investigation was already reaching across hospitals and county and state lines, while the office lacked experience and resources for a case of this scope. A task force could draw on other jurisdictions’ investigators and potentially use Rapid Start, an FBI database tool for organizing large quantities of information. In practice, several Somerset County detectives divided up the work: some pursued hospital details and subpoenas, while others sought Cullen’s family-court records, nursing records from two states, and accounts from former coworkers. The arrangement was a practical response to the case’s scale, though it did not supply the missing clinical and medication records.

Amy Loughren and the Medication Trail

As police interviews spread through Somerset Medical Center, suspicion unsettled the nursing staff. Amy Loughren was known as Cullen’s friend and had previously challenged a new insulin sign-out procedure because she considered its estimates unreliable. She understood that insulin and Cullen were connected to a death, feared that the investigation might implicate her, and repeatedly avoided scheduled interviews before her manager sent her to meet detectives. Her anxiety was intensified by the possibility that she had made a mistake herself; she was not initially approaching the police as a confident witness.

Amy’s recollection later supplied a different way to think about Cullen’s access to drugs. She remembered him positioning himself at the end of the unit’s L-shaped hallway, near the elevators and away from the nursing station, and routinely taking the pharmacy runner’s delivery tote. What had seemed like helpfulness—relieving the runner and stocking the unit—now appeared to give Cullen access without using the Pyxis system. The recollection did not by itself establish what had been placed in any patient’s line, but it offered investigators a possible route around the medication records they could not obtain.

The significance of that insight becomes clearer beside the procedures described elsewhere in the book. At Saint Luke’s Hospital, Cullen could enter a medication room alone, handle drug supplies, prepare syringes, and place medication in named patient trays while appearing to carry out routine work. In another episode, he injected clear Digoxin through an intravenous line’s piggyback port, a procedure that could resemble an ordinary saline flush. These scenes show why access, privacy, and apparently helpful routines mattered to the wider inquiry; they do not substitute for Somerset-specific proof.

An Expanding Inquiry and an Unfinished Case

The investigation’s urgency came from the possibility that the suspected conduct was continuing. Braun believed the clock kept ticking whenever Cullen returned to work, and the hospital’s promise to monitor him did not solve the problem of how to catch him or establish what he had done. The work thus moved on two tracks: tracing earlier warning signs across hospitals and finding evidence that could connect Cullen to the Somerset patients themselves.

By the time the Somerset County Prosecutor’s Office assembled its broader team, the inquiry had produced a strong person of interest and a widening body of paperwork, but no hard evidence and no completed case. The investigators had to compare fragmented histories, work schedules, hospital records, and drug access across jurisdictions, while distinguishing a pattern from proof in individual deaths. The investigation’s central reversal is that the hospital setting offers both the clues and the concealment: medication handling can look like ordinary nursing work, while the records that might expose it may be missing, unavailable, or outside the investigators’ immediate reach. Its early arc therefore ends not with certainty, but with the recognition that Cullen’s access and the institutions’ incomplete response must be investigated together.