Laura Wilson was just 17 when she became the victim of an honour killing.
Ashtiaq Ashgar - the man her mother describes as her daughter's "first love" - attacked her in a frenzied knife attack before dumping her body in a canal near her home in Rotherham.
Retired Det Supt Mick Mason, who worked on the case told Panorama her murder was motivated by "shame" and "honour".
Laura's mother Margaret tells her side of the story for the first time in Panorama: Britain's Crimes of Honour.
Panorama: Britain's Crimes of Honour, BBC One, Monday, 19 March at 20:30 GMT and then available in the UK on the