Man from Sheffield renews appeal to find mother's killer 18 years after her death

The son of a woman from Sheffield murdered 18 years ago is making a renewed appeal to find her killer.

The body of twenty five year old Patricia Grainger was found in a brook near her home at Parson Cross in 1997.

She had been strangled, stabbed and sexually assaulted.

South Yorkshire Police say her murder is the subject of an ongoing review and investigation.