Coval Gann, 82, a man from Chillicothe, Missouri, died at Hedrick Medical Center on March 30, 2002, after a sudden crisis in a place that was supposed to be safe. In later court filings about the deaths at the hospital, his family alleged that respiratory therapist Jennifer Hall administered an intentionally lethal dose of succinylcholine and/or insulin and/or other medication, and that what followed was the kind of rapid “code blue” emergency that left little time for anyone to understand
what was happening until it was already over.
By that spring, fear and suspicion were already creeping through the halls. Staff described an alarming rise in abrupt cardiac-collapse emergencies during the months Hall worked at the facility, with a cluster of codes and deaths that stood out starkly against what the hospital had historically experienced. Accounts tied the pattern to Hall’s repeated proximity to the crises and her role in discovering and reporting each emergency, while internal voices said administrators resisted letting the concern spill outside the building. Those worries would haunt families for years, especially as accusations surfaced that drugs such as succinylcholine—capable of paralyzing breathing muscles and causing slow suffocation in an overdose—were part of what made the episodes so suspicious.
For a long time, there was no arrest tied to Gann’s death. Instead, the story moved through civil courts first, where families sued over what they believed had been concealed, only to see those efforts collide with statute-of-limitations rulings. Even so, homicide investigations do not face the same time barrier, and years later the case gained new momentum as investigators revisited the period of unusual deaths and medical emergencies at Hedrick.
The first major criminal break came in May 2022, when Jennifer Anne Hall was arrested in Johnson County, Kansas, after Missouri authorities sought her in connection with the 2002 hospital deaths. Early filings centered on the death of another patient, but the widening investigation kept pulling attention back to the same brief window in 2002—and to the other families who had waited decades for an explanation.
Ultimately, Gann’s case was no longer just part of the background pattern; it became one of the cases the state said it could prove. The charges were revised to first-degree involuntary manslaughter for the deaths of Fern Franco and Coval Gann, and a second-degree attempted assault count was tied to allegations involving insulin placed into another patient’s breathing-treatment apparatus. In April 2023, Hall pleaded guilty to the manslaughter counts and the attempted-assault count, and in August 2023 she was sentenced to 18 years in prison.
