More than 20 calls were received about the murder of a schoolgirl in 1996 after a Crimewatch episode about the cold case.

Caroline Glachan, 14, was found dead on the water's edge of the River Leven in Bonhill, West Dunbartonshire, 20 years ago on August 25.

She had suffered blunt trauma to the head and drowned.

Her killer has never been found but officers from Police Scotland remain committed to finding the culprit and recently made a fresh appeal for help and information along with the young girl's mother.

Detective superintendent Jim Kerr made a further appeal on the BBC Crimewatch programme on Monday night, which prompted a positive response from the public.

The programme focused on Caroline's murder and featured her mother Margaret McKeitch and her best friend Joanne Menzies.

More than 20 calls were received during the Crimewatch programme and Mr Kerr said he was "hopeful that some calls could assist with the investigation".

They related to the identity of the hooded man in the artist's impression and others offered information in relation to the general inquiry.

Mr Kerr said: "We have received a positive response following last night's appeal on the Crimewatch programme.

"More than 20 calls were received and the information given to police will now be followed up by the officers from the Homicide Governance and Review Team and I am hopeful that some calls could assist with the investigation.

"Anyone with information should contact the Operation Fairing Team through 101. Email officers on operationfairing@scotland.pnn.police.uk.

"Alternatively contact Crimestoppers on 0800 555 111, where anonymity can be maintained."

Mrs McKeitch, 60, said on the show: "I looked out the window and there was a police officer with a policewoman and I knew. I just knew.

"I got this unbelievable pain, which I can still feel, just a pain in my heart. I just knew it was her.

"They came up and they asked about her and the clothing that she had on. I told them and they said that they believed that it was her but they would have to identify her.

"Of course by this time it is my birthday so life didn't begin at 40. For me, it basically ended."