A KNIFE thug who stabbed a man to death was jailed today for a minimum of 17 years.

Alan Robertson struck Allan Doris in the heart outside a flat in Kennishead on February 13, 2023.

The 43-year-old Celtic fan tragically never recovered despite a friend coming to his aid.

Allan Doris Allan Doris (Image: Police Scotland) Jurors heard claims Robertson, 33, did not know how Mr Doris was injured.

But, he was convicted of murder following a trial at the High Court in Glasgow.

After the verdict, prosecutor Chris MacIntosh told how Robertson already had convictions for violence and possession of offensive weapons including an axe.

Alan RobertsonAlan Robertson (Image: Police Scotland) Judge Douglas Brown told Robertson when passing his life sentence that Mr Doris was a "much-loved father, son and brother."

The judge added: "The impact of his death had been devastating and their lives will never be the same again.

"Losing him at a relatively young age is bad but to lose him so suddenly due to a brutal violence is almost unbearable.

"Nothing I can say or do can adequately reflect their loss. This was a brutal knife attack directed on his chest.

"It must have been plainly obvious that it would likely result in his death.

"The fact he died so quickly reflects the nature of the attack and the severe injuries inflicted."

The men had initially been in Robertson's high-rise flat in Kennishead Avenue with others before Mr Doris left.

Forensics at the crime scene (Image: Newsquest) Roberston came out after him. There were claims Mr Doris assaulted Roberston.

The killer was then described by one witness as "absolutely raging".

He went back to his flat, stormed back out and made a "full force thrusting motion" with his arm towards the chest of the victim.

(Image: Newsquest) Mr Doris was heard to groan: "Ah, you have stabbed me."

As Robertson returned to his home, it was then he was clocked with a "shiny and silver" item in his hand.

Mr Doris begged a friend to get him an ambulance. By the time they got downstairs, he was slumped on the floor of the lift.

Mercy crews arrived, but could not save Mr Doris.

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In his evidence, Robertson denied being angry that day. He also claimed not to know how Mr Doris came to be hurt and only recalled seeing him "rolling about the floor".

Prosecutor Mr MacIntosh, in his closing speech to the jury, said Robertson's testimony "did not make sense" and was "manufactured" to help him.

Victoria Young, defending, told the sentencing that her client maintains his position from the trial.

Following the sentencing, Mr Doris' family said: “We are happy that justice has been served and the truth has come out. We are eternally grateful to Mr MacIntosh for his hard work in prosecuting Robertson.

“We also are grateful for the work of the police and the support from the procurator fiscal staff during this hard time.”

Detective Chief Inspector Darren Munogee, Senior Investigating Officer, said: “Our thoughts remain with Allan’s family and friends at this difficult time. I hope this sentence brings some comfort to them as they try to move forward with their lives.

“Robertson will now face the consequences of his despicable actions.

“We are committed to bringing perpetrators to justice and we will continue to work closely with our partners to do so.”