Thirty years ago - Penny Bell was found dead in her car outside a leisure centre in West London. She had been stabbed more than 50 times.
Her killer has never been identified.
Sky's Jonathan Samuels spoke to her daughter Lauren, about her three-decade wait for justice.
WARNING: THIS REPORT CONTAINS DESCRIPTIONS OF VIOLENCE THAT SOME MAY FIND DISTRESSING.
SUBSCRIBE to our YouTube channel for more videos: www.youtube.com/skynews
Like us on Facebook: www.facebook.com/skynews
Follow us on Instagram: www.instagram.com/skynews
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí www.youtube.com/channel/UCzG5BnqHO8oNlrPDW9CYJog
For more content go to news.sky.com and download our apps: