Ex-fiancée of killer fears he will hunt her down after she went undercover for police

A woman who went undercover with detectives after her fiancé confessed to killing a cyclist has told Sky News she fears he will hunt her down one day.

Caroline Muirhead single-handedly helped solve the mystery surrounding Tony Parsons who vanished near Bridge of Orchy in Argyll and Bute during a 103-mile solo trek through the Scottish Highlands in September 2017.

After three years of frantic police searches, involving mountain rescue teams, the investigation came to nothing.