For 30 years, the mysterious disappearance of Helena Andersson has haunted Swedish police; the case is still unsolved, but now investigative journalist Fredrik Undeviks reveals the incredible.

For 30 years, the mysterious disappearance of Helena Andersson has haunted Swedish police; the case is still unsolved, but now investigative journalist Fredrik Undeviks reveals the incredible.

For 30 years, the mysterious disappearance of Helena Andersson has haunted Swedish police; the case is still unsolved, but now investigative journalist Fredrik Undeviks reveals the incredible.