Overview
- The three-part Netflix documentary Should I Marry a Murderer? follows Dr. Caroline Muirhead as she recounts learning her fiancé, Alexander “Sandy” McKellar, had killed cyclist Tony Parsons in 2017.
- According to Muirhead, she covertly gathered evidence, making secret recordings and placing a discreet marker at the burial site before telling police where to search on a remote Scottish estate.
- Investigators later recovered Parsons’ remains in January 2021, and the McKellar twins ultimately entered pleas to culpable homicide rather than murder.
- A Scottish court sentenced Sandy to 12 years in prison and his twin, Robert, to five years and three months after the Crown accepted the reduced charges.
- Muirhead says the months of covert cooperation damaged her mental health and left her feeling unsupported by Police Scotland, which says it provided appropriate help, as experts warn that intimate informants often face extreme isolation and danger.