Injection was the main method used by healthcare killers, followed by suffocation, poisoning, and tampering with equipment. Prosecutions were reported in 20 countries, with 40% of the incidents taking place in the United States. Nursing personnel were 86% of the healthcare providers prosecuted; 12% were physicians, and 2% were allied health professionals. The number of patient deaths that resulted in a murder conviction is 317, and the number of suspicious patient deaths attributed to the 54 convicted caregivers is 2,113.
“Physicians as serial killers are remarkably uncommon,” says Dr. Iserson, who is also director of the Arizona Bioethics Program at the University of Arizona College of Medicine in Tucson. “Nurses [who are serial killers] are much more common, but of course there are more nurses in the hospital, just as there are ancillary people.” (See Figure 1, left.) Dr. Iserson, who practices emergency medicine and consults nationally on bioethics, advises maintaining caution when examining data of charges or suspicions that were never proved.
Most of these crimes (70%) occur in hospital units. (See Figure 2, left.) Victims are almost always female, as are almost half (49%) of convicted serial killers and 55% of the total number of prosecuted healthcare providers. Males are disproportionately represented among prosecuted nurses.
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Motives: Who Is Always There?
Although the motives are complex, some common threads connect these crimes. “There are some classical signs, if you will,” says Dr. Kizer.
When the same person repeatedly calls a code and always seems to be in the thick of it, that is one prime indicator. These people are usually legitimately present in those settings and circumstances—for example, they are on call or working a shift—which makes it more difficult to discern when something is awry. Commonly, the perpetrators have easy access to high-alert drugs without sufficient accountability. Sometimes, once an investigation has been launched it is discovered the person has falsified his or her credentials.
In hospitals, experts say, the “rescuer” or “hero” personality is often on display in those who kill patients—the first person there to give the patient drugs or attempt to save the patient.
“What you are going to see as a pattern,” says Dr. Iserson, “is that they need to be near death.” Codes or calls for respiratory arrest are the most common; patients who have cardiac arrests are much harder to save. Being the hero is not always the motive; the converse can also apply.
Such is the case with nurse Orville Lynn Majors, LPN, convicted of six murders at the Vermillion county hospital in Clinton, Ind. The deaths were consistent with injections of potassium chloride and epinephrine according to prosecutors. Majors’ coworkers were concerned that patients were coding in alarming numbers while in his care. Although this information did not come out until after he was apprehended, his coworkers had a good idea which of his patients would not survive: Patients who were whiny, demanding, or required a lot of work. “The scuttlebutt or rumor among his coworkers,” says Dr. Kizer, “is that they could almost predict which patients would have a demise under his care.”
Although a typical profile of the serial healthcare murderer has been demonstrated in many cases, in many other cases the demographics and behaviors of these killers have deviated widely from generalized assumptions.2 Therefore, before looking at people, look at the numbers.
An unusual number of calls and codes may occur in a particular area of the hospital. “In ICUs you expect a lot of [codes and calls], but not on general post-op wards or the pediatrics MICU,” Dr. Kizer says. “When this happens in these settings it should raise a red flag.”