As the years tick by, journalist Sirin Kale speaks to victims and those who know Matthew to ask whether his stalking will ever truly end

Journalist Sirin Kale meets Matthew’s mother to uncover more about his past, and find out what might have motivated him to cyberstalk his victims for so many years

Matthew’s victims come face to face with him as an attempt is made to stop his torment once and for all

Who is Matthew? Journalist Sirin Kale looks for clues about who this cyberstalker really is and why he creates chaos and fear in so many people’s lives

As the cyberstalker spreads his net wider, anyone could be a target. The fast-changing world of social media creates new opportunities for him to find more victims. Only now, someone is watching him …

Guardian journalist Sirin Kale takes us to a small town in the north of England to uncover how one man began a decade of cyberstalking