Operating in a rural Hungarian town over roughly six years, she worked not only as a killer but apparently as a supplier — selling arsenic to others seeking to eliminate family members, which suggests her reach extended well beyond the three deaths for which she was convicted. The life sentence she received reflected the courts' certainty, even as the full scope of her activity remained difficult to establish.

Over the course of three weeks in late 2017, Cooksey carried out a string of killings across the Phoenix metropolitan area that left eight people dead — a sustained episode of violence that also encompassed serial rape. The span and pace of the attacks, compressed into so short a window, distinguish this case within the record of American spree killings. Conviction came in 2025, nearly eight years after the crimes.