A 14-year-old boy has been reportedly sentenced to a minimum of 13 years behind bars after being convicted for the murder of a 12-year-old girl following a row over a Snapchat video in Liverpool.

 According to reports, the victim identified as 12-year-old Ava White was killed following a “chance encounter” with the then 14-year-old boy, in the English of city of Liverpool in night dimmed the city’s charismas spirit.

Its understood that the teenager, who’s identity has been kept anonymous for legal reasons, stabbed Ava in the neck with a knife after asking a group of boys to stop filming her and her friends, on November 25.

During his sentencing at the Liverpool Crown Court, Mrs Justice Yip said: “There is only one reason why Ava is dead and that is because you chose to carry a knife and you chose to get it out and use it. You enjoyed carrying a knife. You were showing it off to your friends earlier that evening. It was a nasty weapon and you should not have had it ” the Judge remarked.

The boy in question who is said to have an attention deficit hyperactivity disorder, attended the sentencing via video link. He was visibly vexed whilst listening to the remarks as well as statements by Ava’s family including Ava Mother Leanne White

She told the court how Ava had been given special permission to stay out late to attend the Christmas lights event.

“I remember how excited she was for Christmas,” Ms White said as she described her daughter as the “life and soul of the party” who dreamt of becoming a flight attendant and “travelling the world”.

“My heart is broken,” she said. “I just want to go to bed and not wake up.”

Ava’s older sister, Mia tearfully added her reflections: “I am a shadow of my former big, loving sister to Ava.”

Adding that she now feels anxious walking past groups of youths in the street, fearful they could be carrying weapons on their person.

The 18-year-old noted that she hoped the ruling will deter other young persons from carrying knives or consider to do anything similar.

In his defense the boy attempted to argue his action was in self-defense.

The its understood that he felt intimidated when Ava began to approach them and reacted. Adding that his intentions was never to cause hurt but to frighten her away.

However, the prosecution rubbished those claims, and argued that his act was a deliberate and consciously done. They referenced his attempt to discard his coat and the weapon after committing the crime.

Detective Superintendent Sue Coombs from Merseyside Police said the case “shocked everybody” that worked on it.

“It’s tragic,” she said. “It’s a 12-year-old girl and a 14-year-old boy that’s been convicted, so it’s massively shocking.”

“And whilst it’s a very young person that’s perpetrated this crime, they must face the consequences of what they’ve done.”