A convicted killer has been found guilty of murdering a man then chopping up his body.

David Collins attacked Kevin Bishop, 32 with a machete at his home in Paisley, Renfrewshire last July.

Kevin’s torso was later discovered dumped in a bin outside the flat.

Collins told jurors he had been acting in self defence at the time of the attack.

Photo: David Collins

But, the 46 year-old was yesterday found guilty of murder following a trial at the High Court in Glasgow.

Prosecutor Gillian Ross then revealed Collins had been convicted of culpable homicide in 2002.

The thug was jailed for five years at the time after killing his father – also David – with a sword.

A murder probe was launched last summer after Kevin had initially been reported missing by worried family.

Police had made the grim find of the heavily-bound torso in a wheelie-bin.

Photo: Murdered, Kevin Bishop

His head, arms and legs were never recovered. Collins was soon held for the killing.

It emerged he had effectively confessed to his ex-partner Anne Melville.

He said there had been a confrontation and that “Kevin died”.

Anne went on to ask him: “What are you going to do? Fire him in a wheelie bin?”

But, Collins insisted body parts were “already away”.

Despite what he said, Anne told jurors she did not believe her ex.

The mum later went to Collins flat with their daughter to give him a birthday present.

Anne also brought with her a suitcase that belonged to him.

Collins took it in a bedroom – and came back out “heavily sweating”.

Anne recalled going in at one point and there was “something on the floor wrapped in plastic”.

Anne added: “He lifted it and put in the suitcase.”

Miss Ross asked: “Did you question him as to what he was doing?”

She replied: “No.”

The trio then went outside and Collins had the case with him.

Anne: “He put it in the bin…it looked heavy.”

Collins then poured a bottle of aftershave on top to mask any smell that might emerge.

But, Anne insisted: “I did not know what to do. I thought I will wait and see if the guy turns up. There was nothing that I could do.”

After police found the torso, Collins later branded his ex “a grass”.

The trial was told the cause of Kevin’s death could not be confirmed.

Collins gave evidence and claimed Kevin had come at him first with a knife.

He insisted only swinging the machete to “scare” the dad.

Collins told it took only five minutes to hack off Kevin’s head and around an hour for the limbs.

The killer said he was “sick” at what had happened.

Lady Rae ordered Collins serve a minimum 26 years for the murder and attempting to defeat the ends of justice.

She told him: “It would appear that for some reason, if there was one, that you effectively beheaded him.

“You then went to elaborate lengths to destroy evidence which might have implicated you in what appeared to be a motiveless killing.”

The judge said Kevin’s family had been unable to “properly put his body to rest”.

The judge concluded: “What you did was despicable and sickening.

“You gave evidence – I detected no real remorse for what you did.”

Following his conviction, Detective Chief Inspector Martin Fergus from Police Scotland’s Major Investigations Team (WEST) said: “This was an extremely disturbing case which saw a man murdered and then disposed of in the most brutal of ways.

“David Collins is a very dangerous and callous individual and it is a relief that he has been taken out of our community, and will no longer be free to harm others.

“The trial has been a distressing time for the family of Kevin Bishop, who have had to sit and listen to the gruesome details of how their loved one died. I would like to thank them for the support they gave the inquiry team throughout this process and I hope that today’s outcome provides them with some sort of comfort.

“He was last seen by his family on Saturday 28th July 2018 in the Ferguslie Park area of Paisley. They reported him missing to police on Saturday 4th August 2018.

“Kevin’s remains have not been fully recovered and it is vital that we find them in order to allow his family to grieve properly.

“I am appealing directly to anyone who may have knowledge of where his remains may be, to pass this information to Police Scotland’s Major Investigations Team (WEST) via 101.”