John Lafferty, 74, died June 25, 2017, in Tyler, Texas. A Miami University graduate who served 31 years as a Special Agent in the IRS Criminal Investigation Division, Lafferty’s death was later ruled a homicide.

Investigators determined that between 2017 and 2018 William George Davis, a nurse at CHRISTUS Trinity Mother Frances Louis and Peaches Owen Heart Hospital in Tyler, intentionally injected air into arterial lines of several patients, including Lafferty, causing fatal embolisms and severe brain damage in victims. The case names three other patients affected: Ronald Clark, Christopher Greenaway, and Joseph Kalina.

The deaths devastated families and the Tyler community and raised questions about patient safety and oversight at the hospital. Does anyone have information about Lafferty’s final hospital stay or about patient care practices at that facility during 2017?