to take significant action against Cullen. In March 1999, Cullen took a job at the burn unit of Allentown's Lehigh Valley Hospital–Cedar Crest, where he murdered one patient and attempted to murder another. One month later, he voluntarily resigned from Lehigh Valley Hospital and took a job working in the cardiac care unit at St. Luke's Hospital in Bethlehem, Pennsylvania. During the subsequent three years, Cullen murdered at least five patients and is known to have attempted to kill two more. On January 11, 2000, he once again attempted suicide by lighting a charcoal grill in his bathtub and hoped to succumb to carbon monoxide poisoning. His neighbors smelled smoke and called the fire department and police. Cullen was taken to a hospital and a psychiatric facility but returned home the following day. No one suspected Cullen was murdering patients at St. Luke's until a co-worker found medication vials in a disposal bin. The drugs were not valuable outside the hospital, and since they were not used in recreational drug use, the theft was highly unusual. An investigation showed that Cullen had taken the medication. He was offered a deal by St. Luke's to resign and be given a neutral recommendation, or to be fired. He resigned and was escorted from the building in June 2002. Seven of his coworkers at St. Luke's later alerted the Lehigh County district attorney of their suspicions that he had used drugs to kill patients. Investigators never looked into Cullen's past and the case was dropped nine months later for lack of evidence. In September 2002, Cullen began working in the critical care unit of the Somerset Medical Center in Somerville, New Jersey. He began dating a local woman around then, but his depression worsened. Cullen had killed at least thirteen patients and attempted to kill at least one more by mid-2003, using digoxin, insulin, and epinephrine. On June 18, 2003, he unsuccessfully attempted to murder Somerset patient Philip Gregor, who was later discharged and died six months later of natural causes. Somerset began to notice Cullen's wrongdoing when he accessed the rooms and computerized records of patients to whom he was not assigned. The hospital's computerized drug-dispensing cabinets showed that he was requesting medications that his patients had not been prescribed. His drug requests included many orders that were immediately canceled and many requests within minutes of one another. In July 2003, the