In 2014 Di McDonald was recently divorced and dating was the last thing on her mind. But a chance encounter with a customer at the store where she worked changed her life. When she ended her brief relationship with Max Gardiner, he retaliated by embarking on a relentless three-year stalking campaign. This exclusive two-part investigation highlights the difficulties women face in having stalking cases taken seriously by police and explains in forensic detail how Max Gardiner managed to act unapprehended for so long.