Prosper Family Murders: A Detailed Account of the September 13 Attack
On September 13, a series of violent events unfolded within a family flat, resulting in the deaths of three individuals. The perpetrator, Prosper, carried out a planned attack using a shotgun and knives, targeting his mother and two siblings. The events were preceded by hours of online research and the consumption of extreme animated pornography.
The Timeline of the Attack
The violence began in the early hours of the morning. Between midnight and 4:32 a.m., Prosper conducted online research and viewed explicit content. The first physical act of the attack was a "test shot" fired at a teddy bear in his bedroom. Prosper's original plan was to kill his mother, Juliana, and his two siblings while they slept, believing that firing three shots in under 30 seconds would avoid alerting neighbors.
However, the plan deviated when Juliana woke up earlier than expected and discovered Prosper armed with a shotgun. A struggle ensued, during which Juliana suffered defensive wounds to her hands and arms from a knife attack. The confrontation ended when Prosper shot Juliana in the head at close range, killing her. Her body was later discovered in the hallway.
Giselle, having woken up during the commotion, was first grazed in the back of the head. She attempted to hide under a dining table in the living room, but Prosper pursued her and shot her in the face, resulting in her death.
Kyle Prosper attempted to defend himself by retrieving a knife from the kitchen. He was shot in the chest from a distance and subsequently stabbed or slashed over 100 times. Despite a punctured lung and severe injuries, Kyle managed to reach the hallway before Prosper killed him with a close-range shotgun blast to the head.
In total, Prosper fired seven cartridges and reloaded his weapon at least twice during the killings.
Witness Accounts and Police Response
Neighbors reported hearing shouting, fighting, and banging noises. One witness, who noticed the sounds shortly after 5:00 a.m., approached the flat to complain. Upon hearing "banging and ruffling" and the groans of a boy followed by a sound resembling a gunshot, the witness fled. The first emergency call to 999 was placed at approximately 5:29 a.m.
CCTV footage recorded Prosper leaving the flat at 5:33 a.m. Police arrived at the scene at 5:50 a.m. and entered the premises at 6:08 a.m. Inside, officers found the bodies of Juliana, Giselle, and Kyle, along with bloodied handprints, blood stains, and several bloodied knives. Notably, a copy of the novel How to Kill Your Family was found placed on Juliana's body.
Attempted School Attack and Surrender
Following the murders, Prosper headed toward St. Joseph's Primary School on Gardenia Avenue. He was carrying a reloaded shotgun and 33 cartridges in a large bag. However, the presence of high police activity and the realization that the school was not yet open led him to hide in a wooded area for over two hours.
While hiding, Prosper shared a pre-recorded video online at 6:22 a.m. that referenced The Walking Dead. He also disposed of two mobile phones in an attempt to protect a group of paedophiles he had been communicating with on X (formerly Twitter). He eventually abandoned the bag containing the shotgun and ammunition in a bush at a playing field.
At 7:55 a.m., Prosper flagged down a passing police car on Bramingham Road. He decided to surrender because he believed local schools would be under lockdown, foiling his secondary plan. Officers noticed blood on his face and arrested him; during the process, Prosper repeatedly claimed, "It's not murder."
Legal Charges and Premeditation
Prosper was charged with three counts of murder, possession of a shotgun, purchasing or acquiring a shotgun without a certificate, and possession of a bladed article in a public place. Although indecent images of children were discovered on his phone, he was not charged for them due to the severity of the murder charges.
Evidence of premeditation was found in Prosper's clothing and digital history. At the time of his arrest, he wore a distinctive yellow and black "uniform" intended to bring him notoriety. He had purchased these clothes in April 2024 and had previously filmed himself wearing the outfit while simulating the shooting with a piece of wood.
Key Facts
- Victims: Juliana, Giselle, and Kyle Prosper.
- Weapons Used: A shotgun (7 cartridges fired) and knives (over 100 stab wounds inflicted on Kyle).
- Timeline: Murders occurred between 4:32 a.m. and 5:33 a.m. on September 13.
- Evidence: A copy of How to Kill Your Family was left on a victim's body.
- Motive/Intent: Premeditated attack intended to achieve notoriety, evidenced by a custom "uniform" and a rehearsal video.
- Secondary Target: Prosper intended to attack St. Joseph's Primary School before surrendering.
| Detail | Information |
|---|---|
| Date of Incident | September 13 |
| Total Fatalities | 3 |
| Primary Weapons | Shotgun and Knives |
| Time of Arrest | Approximately 7:55 a.m. |
| Charges | 3x Murder, Shotgun and Bladed Article offenses |
Frequently Asked Questions
What was the perpetrator's original plan?
Prosper intended to kill his mother and two siblings in their sleep, believing that firing three shots in under 30 seconds would prevent neighbors from becoming alarmed.
Did the perpetrator target anyone else?
Yes, Prosper attempted to go to St. Joseph's Primary School with a reloaded shotgun and 33 cartridges, but he abandoned this plan due to police activity and the school being closed.
What evidence of premeditation was found?
Evidence included a rehearsal video filmed in April 2024 where Prosper acted out the shooting with a piece of wood, the purchase of a specific yellow and black "uniform" for notoriety, and the placement of a specific novel on a victim's body.
Why was Prosper not charged with possession of indecent images?
While indecent images of children were found on his phone, the authorities decided not to bring those specific charges due to the extreme severity of the three murder charges.
How did the police apprehend the suspect?
Prosper flagged down a police car on Bramingham Road at approximately 7:55 a.m. and surrendered after realizing his plan to attack a school had been foiled.