Two violent thugs have been jailed for life for murdering a Paisley dad in an unprovoked attack after ambushing him at his flat.

Stephen O’Donnell, 30, and Robert Muir, 30, killed father-of-one George Calvert by punching and kicking him.

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They also stamped on his head at his Glen Street home on March 19 last year.

Robert Muir told his accomplice: ‘He’ll no be saying f*** all to any c***' before they murdered their victim George Calvert

Mr Calvert, 48, died from a massive brain injury hours after the brutal attack.

He had 63 injuries – 26 of them to his head and neck.

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Part of the attack took place inside Mr Calvert’s home and his brutal killers left him dying on the landing outside the flat.

Murdered: George Calvert, 48, was killed by Stephen O'Donnell and Robert Muir
Murdered: George Calvert, 48, was killed by Stephen O'Donnell and Robert Muir

Earlier today at the High Court in Glasgow, judge Lady Rae ordered both of them to serve 20 years in prison before they are eligible to apply for parole.

She  told the pair: “You were both found guilty by a jury of what can only be described as a brutal and savage attack on a man in his own home.

“He suffered multiple injuries to his head and body caused by you two kicking, punching and stamping on him.

“I detect little or no remorse.

“You O’Donnell tried to minimise your involvement and Muir you said you have no memory of events.”

Stephen O’Donnell, 30, murdered George Calvert in a brutal attack in Glen Street, Paisley

At the time of the murder both men were on Community Payback Orders – O’Donnell for drink-driving and driving while disqualified and Muir for an assault with a bottle.

Prosecutor Graeme Jessop said: “They both had appointments for the Community Payback Orders that morning but were sent away.”

The court heard that both men then headed to O’Donnell’s flat where they sat drinking, and in the afternoon murdered Mr Calvert.

O’Donnell, who was in a relationship with 19-year-old Kisteen Templeton, feared that Mr Calvert would tell her jealous ex-boyfriend Robert Cowan about them.

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Before heading to Mr Calvert’s flat, O’Donnell told his friend Muir: “George saw me and her walking about and I wouldn’t be surprised if he tells Robert Cowan.’”

And Muir replied: “‘He’ll no be saying f*** all to any c***,’” before adding: “Don’t worry. I’ll back you 110 per cent”

The sound of the horrific beating and Mr Calvert whimpering was heard by people in neighbouring flats.

The callous pair left Mr Calvert dying and minutes later O’Donnell told Ms Templeton: “We’ve just done George in.”

O’Donnell, who lived in the same block of flats, tried to fool police by telling them he just had arrived home and found the street ‘Like a CSI parking lot.”

Police officers at the scene of the murder in Glen Street in March last year

His accomplice Muir asked Ms Templeton to lie for them and say they were in O’Donnell’s flat all day.

They were brought to justice because their clothes and shoes were covered in droplets of Mr Calvert’s blood.

Muir’s handprint in Mr Calvert’s blood was found on a wall close to where Mr Calvert lay.

Prosecutor Graeme Jessop said: “This was a concerted attack, a vicious attack and a sustained attack on a man who was ambushed at his front door as he came back home.

“It was unprovoked.”

Investigation: Forensics officers at Glen Street, Paisley, in the aftermath of the murder

O’Donnell and Muir had both earlier offered pleas of guilty to the lesser charge of culpable homicide, but these were rejected.

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Tony Graham QC, representing O’Donnell said: “It was never the intention to do more than an assault or a breach of the peace, but it escalated.”

Defence counsel Thomas Ross QC for Muir said: “He doesn’t remember anything about the offence due to intoxication.”