The mother of murdered schoolgirl Nikki Allan has refused to accept a police apology over failings in their investigation.

Yesterday (Wednesday, May 17), Northumbria Police apologised to Sharon Henderson for their handling of the 1992 murder of her seven-year-old daughter Nikki, which went unsolved for 30 years.

They also apologised George Heron, who was wrongfully accused of killing the schoolgirl, whilst the real killer walked free. David Boyd, 55,  was last week convicted of the murder, three decades after stabbing Nikki to death.

Ms Henderson, 56, says she should have been visited personally by a senior officer rather than hearing of their apology through the media.

The Northern Echo: Sharon HendersonSharon Henderson (Image: Contributor)

Read more: Northumbria Police apologise to mum of murdered Nikki Allan

She described the move as "hollow" and said she would prefer Northumbria Police to be appealing for more victims of Nikki's killer, David Boyd, to come forward.

Assistant Chief Constable Alastair Simpson told reporters on Wednesday: “I am truly sorry for the mistakes that were made in the 1992 investigation and I’m sorry for the length of time it has taken to get justice for the family.

“I can’t imagine the impact on them over the course of the last 30 years so I have offered to meet with Sharon and with other members of the family, and I will be happy to say that to them when I meet.”

The force also apologised to wrongly accused George Heron, who they "built a case around" as Boyd, 55, was left to walk free for 30 years.

Sharon said: "I don't accept their apology, it feels hollow to me, especially as I had to hear about it through the media.

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The Northern Echo: Nikki AllanNikki Allan (Image: Contributor)

"I would have appreciated a senior officer coming to my door to talk to me and to apologise in person, face to face.

"This acceptance of all the failings over so many years has been a long time coming and this was not the way to do it.

"I was left to investigate Nikki's murder myself for all that time and I asked the question over and over again about who that man was who lived in the flat three doors from my dad and step-mam.

"And yet it took 30 years and a DNA scientist to catch up with Boyd, he should have been in their sights immediately.

"Instead of apologising to me, I would prefer them to be appealing for more victims of Boyd to come forward.

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"Because of their investigation he has been free to do as he likes for all this time, thinking he's untouchable and there will be other victims out there, I'm sure of that.

"It was a shock to watch some police officer I'd never seen before making an apology to me on the TV at a news conference I didn't even know was happening.

"I'd prefer to see action rather than words, I think other people were involved in Nikki’s murder and to me this is not over and I won't be satisfied by an apology made through the media."