The daughter of the elderly dog walker who was killed by a teenage boy has said she is “disappointed” that the Court of Appeal refused to change his sentence for manslaughter. Speaking after the hearing outside the Royal Courts of Justice, Susan Kohli told reporters that "the guidelines need to change".

She said: "We need to go to Parliament to get these guidelines changed, to hold these youths responsible for what they do. It cannot continue. We should not have to lose somebody else to these youngsters." Bhim Kohli, 80, was punched and kicked, slapped in the face with a shoe and racially abused in an attack in Franklin Park, Braunstone Town, near Leicester, on September 1 last year, and died the next day.

His 15-year-old attacker, who cannot be named for legal reasons, was sentenced to seven years’ custody after being convicted in June.

At the Court of Appeal on Wednesday, lawyers for the Solicitor General said his sentence should be increased, while lawyers for the boy said it should be reduced.

Lady Justice Macur, sitting alongside Mrs Justice Cutts and Mr Justice Murray, refused to change the sentence, saying it was neither "unduly lenient" nor "manifestly excessive." Ms Kohli said after the hearing that "justice has not been done."

She said, "What I’m prepared to do is go as far as I can, reach out to MPs, get this changed in Parliament, get the guidelines changed, so that we have tougher sentences for these youths.

"Because if the youths are prepared to conduct themselves in the way that they do, they should be prepared to face the full weight of the law. It should not be allowed."

Asked if there should be more responsibility from the families of offenders, she said: "Yes." She continued: "This is what needs to be investigated as well. We cannot just sit on it and say oh, ‘This is what is happening with the parent’. OK, let us look into more detail about that."

The boy was convicted alongside a 13-year-old girl, who also cannot be named. She encouraged the attack by filming parts of it while laughing, with video clips showing the balaclava-clad boy hitting Mr Kohli with a shoe.

Another clip showed Mr Kohli lying on the ground motionless. The girl took a photograph of Mr Kohli on her phone the week before the alleged incident, but denied she used this to "target" him, the trial heard.

Police also recovered a video from her phone of a group of children "confronting" an unknown man on a separate occasion, who was hit to the back of the head and called a "Paki bastard," while she was heard laughing.

The girl was sentenced to a three-year youth rehabilitation order by Mr Justice Turner, and her sentence was not referred to the Court of Appeal. Mr Kohli’s children found him lying on the ground in agony, and he told his daughter he had been called a “Paki” during the attack, the court heard during the trial.