Teenager from Luton in Bedfordshire, UK, on Monday admitted to the brutal slaying of his mother, sister and brother in bloody shotgun rampage at home

Nicholas Prosper had been due to go on trial next week accused of killing Juliana Prosper, 48, Giselle Prosper, 13, and Kyle Prosper, 16, on September 13, 2024

He pled guilty to possessing a firearm with intent to endanger life, and being in possession of a kitchen knife when he was arrested, a short distance from the crime scene

Subsequent Police investigations uncovered his loaded gun and ammunition along with his intention of carrying out an attack at a school

Prosper was remanded back into custody until he is sentenced on March 5

Nicholas Prosper [photo], 19, on Monday pled guilty to triple familicide at Luton Crown Court – murdering his mother and two siblings five months ago

UK schoolboy Nicholas Prosper on has pled guilty at Luton Crown Court to murdering his mother and two siblings last year September.
Three members of the defendant’s were found dead in the Leabank area of Luton, in Bedfordshire six months ago. The suspected killer Nicholas Prosper, then 18, was arrested near the crime scene shortly after law enforcement responded to reports. The suspect’s loaded shotgun with more than 30 cartridges was found in a bush after his arrest, by police who said he had the intention of carrying out an attack at a school,
At Luton Crown Court on Monday, the 19-year-old who is on trial for killing his mother Juliana Prosper, 48, hi sister Giselle Prosper, 13, as well as his 16-year-old brother Kyle Proper, in a shotgun rampage on September 13, 2024, entered a single guilty plea to each of the three murder charges today.
Nicholas Prosper also admitted to buying a 12-ball Nikko shotgun, without a certificate, a day prior to going on a rampage.
The defendant pled guilty possessing a firearm with intent to endanger life, and being in possession of a kitchen knife when he was caught by police after carrying out the atrocity, a short distance away.

Nicholas Prosper admitted in court Monday that shot dead his mother Juliana Prosper, 48, on September 13, 2024

Nicholas Prosper also admitted that he killed his 13-year-old sister Giselle Prosper [left], as well as his 16-year-old brother Kyle Prosper [right], during last year’s rampage

Prosper was remanded back into custody until he is sentenced on March 5.
Speaking after after court today deputy chief crown prosecutor at the Crown Prosecution Service, Chris Derrick, announced: ‘Nicholas Prosper has been convicted of the murder of his mother, Juliana Falcon, and two younger siblings, Kyle and Giselle Prosper, on September 13 last year.
Det Chief Inspector Sam Khanna, from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, gave further details about Prosper’s actions and plans following today’s pleas.
He said: ‘This was a truly tragic and shocking case in which three innocent members of the same family have been brutally killed by their son and brother.
‘No words can fully describe the tragedy their loved ones have experienced, and our thoughts continue to be with them at this difficult time.’

Juliana Falcon [center], moved to the UK from her native Argentina to the UK 30 years ago. Last year she was murdered by her eldest child Nicholas Prosper who is now on trial for killing his mom as well as his younger siblings Kyle, [left], and Giselle [right]

A mourner leave floral tributes at memorial created to honor the slain members of the Prosper family home outside their home in the city of Luton in Bedfordshire, UK

The shooter reportedly struck at his home, an apartment on the eighth floor of one of the towers popular with young families just outside Luton town center last year.
Councillor Hazel Simmons, leader of Luton Council, said: ‘First and foremost, we must remember the three innocent victims of these senseless murders. Our thoughts and prayers are very much with them today, along with their family, friends and the wider community who are still deeply impacted by what happened last year.’
Neighbors previously revealed that the defendant spent so much time on the internet in his bedroom that those living directly underneath him in Leabank Tower had no idea he even existed – despite being on friendly terms with his mother and siblings.

Tower blocks in Leabank, Luton, Bedfordshire where the Prosper family was massacred by a relative on Sept. 2024

Familicide suspect Nicholas Prosper [photo], had previously denied murder but he dramatically entered guilty pleas during a six-minute hearing at Luton Crown Court on Monday Feb 24, 2025

A local, Grazyna Karwecka, who lived above Prosper and his family, recalls hearing a woman screaming followed by gunshot and then other loud noises: ‘It sounded like a gun. It was around 5.15am maybe – it was completely silent, I was in my bathroom doing my make up.’
She added: ‘Suddenly I hear a scream – a woman’s scream. Nobody else. It was really strange, especially at this time of day.
‘There was silence. Then I hear some furniture falling or something like that, for maybe ten seconds. Then nothing.
‘I heard a gun fire before the scream – I think it was a woman.’

Police responding to reports of shots fired at a high-rise block in the Leabank area of Luton, on Sept. 13, 2024. discovered three casualties were found in the Leabank area of Luton. Suspected shooter Nicholas Prosper, then 18, was arrested nearby

Juliana Falcón was from Buenos Aires Province, Argentina, migrated to England 30 years, ago. She married Ray Prosper, with whom she shared four children. At the time of the killings, she resided in an apartment off Wauluds Bank Drive with three of her teenage children, including Nicholas.
A reflecting on her death said: ‘She was a super intelligent woman and she was a very dedicated mother to her children, so I find no consolation or explanation for what happened.’