Cullen Poisons Edward O’Toole with Vecuronium

Charles Cullen’s poisoning of Edward O’Toole with vecuronium at Saint Luke’s Hospital exposed how a lethal act could be concealed inside ordinary nursing routines. Cullen’s access to medication and his seemingly helpful conduct let him move through the unit without drawing immediate attention; the signs of danger accumulated instead in discarded drug vials and the sharps box. By the time staff linked the missing paralytic to O’Toole, the hospital faced not only a patient-safety emergency but the possibility that someone on the unit was deliberately harming patients.

Background and Opportunity

On June 1, 2002, Cullen arrived early for a night shift at Saint Luke’s. He preferred the hospital at night, when visitors and other nonessential activity had receded. The unit’s routine gave him access to patients, medication, and the spaces where supplies were handled. He watched the patient monitors, then carried the pharmacy runner’s deliveries to the medication-supply room, entered his access code, and shut the door. The book presents enclosed spaces as places where Cullen felt at ease, but the practical opportunity is clear: he could handle medication while alone and appear to be performing ordinary stocking duties.

The account distinguishes this episode from an earlier poisoning method. On another occasion, Cullen injected digoxin directly into an intravenous line through its piggyback port, an access point nurses commonly used to flush a line. At Saint Luke’s, he chose an indirect approach: preparing medication in the supply room and later appearing to help with other nurses’ intravenous lines. The difference mattered to concealment. His actions could look like routine assistance, and colleagues had no evident reason to connect separate moments of stocking, line preparation, and response to a patient emergency.

The Poisoning and Its Concealment

In the medication room, Cullen used a syringe to draw from saline and then inject into intravenous bags. He discarded the emptied vials and used syringe in the metal sharps container, then placed the prepared medication mixtures in the trays assigned to named patients. The narrative emphasizes the small, familiar gestures of this process: opening a syringe wrapper, handling the bags, and disposing of the equipment. Nothing in those actions, viewed separately, necessarily announced an attack.

The evidence establishes that the drugs had been used on Edward O’Toole about seven hours before staff examined the sharps box on Monday morning, June 3. The surrounding account connects that discovery to the vecuronium concealed among the discarded materials. It does not specify the exact moment or route by which O’Toole received the drug, or describe his subsequent medical outcome; what it does establish is that the dangerous agent had been used on him during the preceding night. That finding gave the discarded vials a human consequence: they were not merely missing stock or waste, but evidence connected to a patient.

The concealment depended in part on Cullen’s established manner on the unit. He was often useful to coworkers, and his movements could pass as assistance: stocking medication, helping set up intravenous lines, and later taking part in a code. Kim Wolfe, who had worked overlapping shifts with him for more than two years and regarded him as helpful, did not initially approach him as a suspect. The contrast between that familiar reputation and the danger represented by the vials sharpened the discovery’s force.

Discovery in the Sharps Box

The first alarming inspection began when staff noticed medication irregularities and missing drugs. The sharps box could be opened only by Environmental Services, who held its key. Gerry Kimble and Candy Wahlmark emptied it into a bedpan, then sorted the discarded items in a spare room, carefully separating drugs from needles and listing what they found. Among the material were six bottles of vecuronium bromide, along with other powerful medications, and forty boxes of the missing Pronestyl.

The quantity and character of the drugs made ordinary diversion an inadequate explanation. Staff were familiar with theft of drugs that could be sold or used recreationally, but the cache included large amounts of medications with no obvious recreational appeal. The empty vecuronium bottles were especially troubling. The drug arrived as powder in sealed vials; using it required adding saline through the stopper with a syringe, shaking the vial, and withdrawing the reconstituted drug. The empty containers therefore indicated not simply that medication had disappeared, but that someone had prepared it for use. Staff estimated that 60 milligrams had been reconstituted, although no patient on the cardiac care unit had been prescribed vecuronium during the four-shift weekend.

The danger was not abstract. Vecuronium is a powerful paralytic: it can disable the muscles while leaving a patient conscious and able to feel pain, until respiratory and heart muscles fail. This made the unexplained preparation of the drug, in a unit full of vulnerable patients, a particularly grave warning. The medication itself dictated the stakes of the search: investigators and nurses were no longer dealing with a puzzling inventory discrepancy, but with a substance capable of causing a patient to suffocate while unable to move or call for help.

Identification and Institutional Response

As staff tried to understand the cache, Kim Wolfe and Candy Wahlmark watched the medication-room door. They saw people enter to restock, but remained uneasy about the unexplained drugs. When Cullen arrived early, he wheeled chairs down the hall, then entered the medication room using the access code. Kim and Candy watched him go in; about five minutes later he emerged and walked away. Kim went to the room, looked inside, and found that the sharps box was full again. The sequence gave their suspicion a specific focus, and they alerted ICU floor manager Ellen Amedeo, telling her they believed they knew who had been using the vials.

The next inspection took place at the Monday morning shift change. Kimble and supervisor Terry Koehler, wearing sterile gloves as a hospital security officer watched, emptied the box again. They found several dozen bottles, many empty, including ten spent vecuronium vials. The drugs had already been used on O’Toole seven hours earlier. The timing made the inspection more than a search for missing property: the evidence in the container was tied to a poisoning that had already taken place.

Hospital administrators began to respond. Risk manager Janice Rader directed the charge nurse to check the sharps box regularly during the day shift; Cullen was not working, and the box remained empty. Rader then contacted risk-management director Ken Vail. They considered what would be best for the hospital, given that Cullen was scheduled to return in less than eight hours, and consulted in-house counsel Sy Traub. Traub brought in the Stevens and Johnson law firm, whose lawyers included former prosecutor Paul Laughlin. The sequence shows the institution shifting from internal observation toward legal and risk management, even as the immediate problem remained the prospect of a dangerous employee returning to the unit.

The poisoning’s significance lies in the collision between routine and evidence. A syringe, a medication tray, a helpful nurse, and a locked supply room belonged to ordinary hospital work; together, they also provided the means and cover for harm. It took the unusual contents of a sharps box, the attention of coworkers, and the connection to O’Toole to make that concealed activity legible. The account does not resolve O’Toole’s outcome in this episode, but it makes the central danger unmistakable: a paralytic prepared outside any prescription had reached a patient, while the person suspected of preparing it was still part of the unit’s staffing schedule.