Post-mortem examinations have revealed that two young girls, Jasmin Kuczynska, 12, and Natasha Kuczynska, 8, found dead in a house in Costessey, near Norwich, died from knife wounds to the neck. The bodies were discovered on Friday alongside those of Kanticha Sukpengpanao, 36, and Bartlomiej Kuczynski, 45, who also died from stab wounds to the neck. The police are treating the deaths of the girls and Ms. Sukpengpanao as murder.
Mr. Kuczynski’s death is not considered suspicious and no other suspects are being sought in relation to the murders. The Norfolk Police have referred the case to the Independent Office for Police Conduct (IOPC).
The IOPC confirmed that Mr. Kuczynski had called 999 from inside the house shortly before 06:00 GMT, expressing confusion and concern about his mental state. He was advised to seek medical help and contact the NHS on 111. Police only arrived at the scene after a second 999 call was made by a member of the public at 07:00 GMT.
The IOPC will investigate whether the initial call was handled appropriately according to force policy, training, and procedures. They will also be in touch with the families of the deceased to explain their role in the investigation.
Detective Chief Inspector Chris Burgess expressed sympathy for the family and the wider community affected by this shocking incident. A cordon will remain at the crime scene while a detailed examination is carried out. The police initially reported that Natasha was nine years old, but later corrected this information.