Michael Swango Was Linked to 60 Deaths. Was Lucy Letby Wrongfully Convicted?

True crime feels different when the setting is a hospital. In this episode of The ER Edit, we take on two cases that sit on opposite ends of the evidence problem. One involves a physician who repeatedly moved through medical systems while patients and coworkers became sick or died around him. The other involves a neonatal nurse convicted of murdering babies in a case built largely on circumstantial evidence. Together, the stories raise an uncomfortable question: what happens when institutions either miss a real threat or become convinced they have found one without proving it clearly enough?

Caitlin begins with Michael Swango, a licensed physician and convicted murderer linked to as many as 60 deaths involving patients and colleagues. Swango was intelligent, accomplished, and able to present himself as exactly the kind of person institutions wanted to trust. He served in the Marines, attended medical school, and entered a neurosurgery residency path. The warning signs were there. He reportedly had a fascination with death and dying, faked required clinical work, and was nearly expelled from medical school. Still, he graduated and kept moving forward.

At Ohio State University Medical Center, nurses noticed apparently healthy patients becoming critically ill or dying with alarming frequency. One nurse reportedly saw Swango injecting something into a patient who later became sick. The nurses raised concerns and were treated as though they were paranoid. Nurses are often the people who see a pattern first because they are continuously watching the patient. Swango’s residency offer was withdrawn, but the danger was not stopped. At another workplace, coworkers became violently ill after he prepared coffee or brought food. Arsenic and other poisons were found in his possession, and he was convicted of aggravated battery for poisoning colleagues.

Even that conviction did not end his access to vulnerable people. Swango was released, changed his name to Daniel Adams, forged records, concealed his criminal history, and reestablished himself as a physician. He entered new hospitals, including a psychiatric residency program in New York. Once again, unexplained patient deaths followed. His fiancée, a nurse who had experienced severe migraines while living with him, left after learning about his hidden history. Her headaches stopped after she got away. She later died by suicide, and arsenic was reportedly found in her body. The episode treats those circumstances carefully without claiming more than the discussion supports.

After being blocked from practicing medicine in the United States, Swango fled to Zimbabwe and obtained another hospital job using forged documents. Patients again began dying under suspicious circumstances. A woman renting him a room became severely ill after a meal, and testing of her hair showed toxic levels of arsenic. Authorities eventually arrested Swango during a layover in Chicago. He admitted to three murders and was believed by investigators to be responsible for many more. The secondary horror is how long he remained employable. Dismissed nursing concerns, administrative delays, and gaps between institutions repeatedly gave him another place to start over.

The second half turns to Lucy Letby, the neonatal nurse convicted in 2023 of seven murders and seven attempted murders. Karlie knew the broad outline, but after watching a documentary and looking more closely at the evidence, she came away with far more doubt than expected. The prosecution argued that Letby intentionally harmed infants through several methods, including insulin, air embolism, overfeeding, interference with equipment, and physical harm. The discussion focuses on what was not present in the case as described: no eyewitness who saw her intentionally harm a baby, no surveillance footage showing it, no confession, and no DNA evidence directly connecting her to an act of murder.

Some evidence sounds highly suspicious until it is viewed through a nursing lens. Letby was present for many collapses, but she was also one of the more experienced nurses on the unit, making her more likely to care for the sickest babies or enter a room when help was needed. Her Facebook searches for patient families were presented as unusual, but healthcare workers can become emotionally invested after traumatic cases. That does not make the searches appropriate, but it makes them less automatically sinister. Her journal entries also included phrases that sounded like admissions. In the fuller context discussed in the episode, those notes were written during court ordered therapy while she was processing the accusations against her.

The episode does not declare Lucy Letby innocent. It asks whether the evidence described was enough to eliminate reasonable doubt. The insulin findings are treated as significant, but the alleged methods varied sharply between cases. The defense reportedly did not call a single expert witness, even though medical and nursing experts could have explained staffing patterns, NICU layouts, emergency response, and alternative interpretations of clinical deterioration. Ordinary bedside behavior can sound incriminating when described to people without healthcare experience.

Both cases are about institutional trust, but they move in opposite directions. Michael Swango shows what can happen when healthcare systems disregard warnings. The Lucy Letby discussion asks what can happen when a system becomes certain that one person explains a cluster of tragedies. In one story, nurses sounded the alarm and were ignored. In the other, nursing context may not have been explained strongly enough. The result is a healthcare true crime episode about murder, medicine, hospital culture, circumstantial evidence, and the space between suspicion and proof.