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A porn star killed a man on camera during sex after he had battered his partner to death with a hammer and decapitated them both, a court heard.

Yostin Andres Mosquera, 35, then wheeled the dismembered heads of Albert Alfonso, 62, and Paul Longworth, 71, in a suitcase before putting them into a chest freezer, jurors heard.

Other parts of their bodies were found in two suitcases on Bristol’s iconic Clifton Suspension Bridge on 10 July last year.

Mosquera, a Colombian national, had been staying at the couple’s home on Scotts Road, Shepherd’s Bush, west London, where the decapitated heads were found.

Mosquera had met Mr Alfonso online where the Columbian used the names ‘iamblackmaster’ and ‘mrd—k20cm’, Woolwich Crown Court heard.

He came to the UK to participate in sex acts and he dominated and degraded Mr Alfonso in films that the now dead man posted online.

Mosquera denied murdering retired handyman Mr Longworth, the court heard.

He also denies murdering Mr Alfonso, a swimming instructor, but has admitted to manslaughter.

A Porn star murdered couple Albert Alfonso, 62, (right) and Paul Longworth, 71, (left) before wheeling their dismembered heads in a suitcase and putting them into a chest freezer, jurors heard

Yostin Andres Mosquera, 35, a Colombian national, denied murdering the retired handyman Mr Longworth, the court heard. He also denies murdering Mr Alfonso, a swimming instructor, but has admitted to manslaughter

Mosquera came to the UK to participate in sex acts and he dominated and degraded Mr Alfonso in films that the now dead man posted online

Jurors were warned they would have to view the horrifying footage of Mr Alfonso being stabbed to death during sex.

Mosquera was allegedly filmed dancing and singing in jubilation within seconds of slitting the throat of Mr Alfonso during a sex game caught on camera on July 8, 2024. 

Hours earlier, the 35-year-old allegedly battered Mr Alfonso’s partner Mr Longworth to death with a hammer in order to steal from the London couple, whom he had met online.

Prosecutor Deanna Heer, KC, said: ‘According to their neighbours, they were a friendly couple who seemed happy together and to be genuinely fond of one another. None of them noticed any conflict within their relationship.

‘However, Mr Alfonso liked extreme sex, which he videoed and posted online on specialist websites.’

A witness using the pseudonym James Smith had known Mr Alfonso and Mr Longworth for about 18 years and, by the time of their deaths, considered them to be close friends.

Ms Heer said: ‘He regularly engaged in acts of sexual domination with Mr Alfonso, for which he was paid. Some of those encounters were also posted online.

‘They involved Mr Smith degrading Albert Alfonso by urinating, defecating and vomiting on him.

‘Over the years, the relationship between Mr Smith and Alfonso ebbed and flowed and there were significant periods of time when they were not in contact with one another.

‘Mr Smith’s description of their early relationship is undoubtedly troubling…He recalls as a young man getting drunk with Alfonso only to be told in the morning that they had had sex and that Alfonso had filmed it.

A court artist drawing by Elizabeth Cook of Yostin Andres Mosquera (right) in the dock on May 1

Forensic officers at the couple’s address in Shepherd’s Bush, west London, after human remains were found in two suitcases near the Clifton Suspension Bridge in Bristol

Mosquera (left) is pictured alongside Albert Alfonso (centre) and Paul Longworth (right)

‘Alfonso promised not to show anyone else if Mr Smith agreed to do him sexual favours. Thinking that he was to blame and knowing that Alfonso had the video, Mr Smith decided he may as well make some money out of the situation, and he agreed.

‘But he told Alfonso he was not into the sex. Alfonso told him about domination and Smith agreed to degrade Alfonso in the way I have described. To use Smith’s own words, it was not a good start.

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‘That is something of an understatement but over time both Paul Longworth and Albert Alfonso became, in his description, like family to him and they would spend time together doing other things, although his sexual encounters with Alfonso were always something he kept to himself and kept extremely private.’

Prosecutor Heer added: ‘At about 11.30pm on the night of the 10 July 2024 Douglas Cunningham was cycling home across the Clifton Suspension Bridge in Bristol when he saw the defendant, Yostin Mosquera, standing next to a large red suitcase.

‘Thinking he was a lost tourist, Mr Cunningham stopped to see if he was okay.

‘A few metres away from where the defendant was standing, on the bridge approach, there was another suitcase, a large silver trunk.

‘The defendant told Mr Cunningham that he was from Colombia and that the suitcase he was standing with contained car parts. That was a lie.

‘In fact, the suitcases contained the decapitated and dismembered bodies of Paul Longworth and Albert Alfonso, which the defendant had taken to Bristol from their home in London where they had been killed two days before.

‘Their decapitated heads would be found by the police in a chest freezer at their flat at 9 Scotts Road in Shepherds Bush.

‘Paul Longworth had been attacked with a hammer to the back of his head, suffering repeated blows, such that his skull was shattered.

‘Albert Alfonso had been repeatedly stabbed, suffering multiple wounds to his torso and to his face and to his neck. His throat had been cut.’

Other parts of their bodies were found in two suitcases on Bristol’s iconic Clifton Suspension Bridge on 10 July last year

On the day that the two men were killed Mosquera googled ‘where on the head is a knock fatal?’ and ‘how long before a corpse starts to decompose?’

The post mortem examination of Mr Longworth’s body revealed that he had suffered severe blunt force trauma to the head which caused his death, said Ms Heer.

She explained that there were injuries on his hand, which suggested that he had tried to defend himself.

When the flat was later searched, a hammer was found lying on the floor in the hallway. It was found to be stained with Paul Longworth’s blood’, the court was told.

Turning to the murder of Mr Alfonso the prosecutor said: ‘The evidence suggests that he was killed at about 10.15pm in his bedroom.

‘The killing was captured on cameras which had been set up by Mr Alfonso in his bedroom to record a sex session between him and the defendant.

‘The footage, some of which I am afraid it will be necessary for you to see, shows that the defendant ended that encounter by repeatedly stabbing Albert Alfonso and cutting his throat.

‘The footage shows that Alfonso was, throughout, in a submissive position.’

‘The defendant admits that he killed Albert Alfonso. He could hardly deny it, because the killing took place whilst he and Alfonso were having sex, and the sex and the killing were recorded on film.

‘However, although he admits killing Albert Alfonso he denies the offence of murder, admitting only the lesser offence of manslaughter – and he denies that he killed Paul Longworth at all.

‘He blames Albert Alfonso for Paul Longworth’s death.

‘The prosecution case is that the defendant murdered both men, that he intended to kill them, that his actions were planned and premeditated.’

Mosquera appeared in the dock wearing a white shirt assisted by a Spanish interpreter.

Ms Heer told the jury: ‘The prosecution suggests that the evidence is clear: the defendant, we say, is guilty of nothing less than the murder of both Paul Longworth and Albert Alfonso.

‘Albert Alfonso simply had no reason to kill his lifelong friend and partner, Paul Longworth.

‘Their relationship was unconventional, there’s no doubt about that but, whatever you may think about the way Albert Alfonso conducted his sex life, the evidence suggests that they accepted one another and cared for one another.

‘As far as the murder of Paul Longworth is concerned, it is very easy for the defendant to blame Albert Alfonso, who is no longer alive to contradict him but Albert Alfonso is not the culprit. Rather, all the evidence demonstrates that the defendant is.

‘Indeed, the evidence demonstrates that the defendant killed Paul Longworth at the flat whilst Albert Alfonso was at work. It was the defendant who searched the internet for how to kill someone by striking their head, just as Paul Longworth was killed by strikes to the head; and it was the defendant who was looking for a chest freezer.’

Ms Heer referred to the video footage that was shown to the jury, in which Mosquera can be seen dancing after he has attacked Mr Alfonso.

‘In respect of the murder of Albert Alfonso, the footage of his killing at the hands of the defendant is not easy to watch but it demonstrates with absolute clarity that the defendant was in complete control of his actions at that time, which were strategic and premeditated.

‘He armed himself with the knife and fuck waited for the opportunity to use it to cut Alfonso’s throat in a deliberate and calculated act of killing. And having done so, as Albert Alfonso lay dying at his feet, the defendant immediately went to his computer and tried to steal from him.’

Mr Longworth was Irish and Mr Alfonso was originally from France but had obtained British citizenship.

The new trial comes after the prosecution opened its case at the Old Bailey at the end of April but two weeks later Mr Justice Bennathan discharged the jury.

The retrial continues.

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