Costessey deaths: Dad told 999 he had a knife before killing daughters and their aunt
A member of police staff is facing misconduct allegations over their handling of a 999 call
Last updated 24th Apr 2025
A member of police staff is facing misconduct allegations over their handling of a 999 call made before four people were found dead at a property in Norfolk.
The police watchdog has been investigating Norfolk Police's handling of the events leading up to the deaths of Bartlomiej Kuczynski, 45, his daughters Jasmin, 12 and Natasha, eight, and their aunt Kanticha Sukpengpanao, 36, who were found inside a property in Allan Bedford Crescent in Costessey on January 19 last year.
All four died from knife wounds, post-mortem examinations confirmed.
Norfolk Police previously said the deaths of Ms Sukpengpanao, Jasmin and Natasha were being treated as murder.
The death of Mr Kuczynski was not being treated as suspicious, and officers are not looking for anyone else in connection with the killings.
Norfolk Police referred itself to the Independent Office for Police Conduct (IOPC), following contact the force had with the man prior to the deaths.
In an update on Wednesday, the IOPC said a Norfolk Police staff member had a case to answer for misconduct following a 999 call before the four bodies were found.
Police received a 999 call from Mr Kuzcynski on the morning of January 19 but officers were not deployed to the address until an hour later when police were called by a concerned dog walker, the watchdog said.
In an audio recording of the call, Mr Kuczynski said: "I am walking with the knife, I have just lost the plot."
Mr Kuczynski expressed concerns about his own mental state and said he was confused.
The call handler advised him to seek medical advice and police did not attend the property as a result of the call.
When questioned as part of the IOPC investigation, the call handler said he did not hear the word "knife" and would have acted differently had he done so.
The call handler was initially suspended but has returned to work following a review and remains on restricted duties.
A misconduct meeting will take place in due course, the IOPC said.
During a pre-inquest review into the deaths at Norfolk Coroner's Court on Wednesday, the full inquest was delayed until 2026 - pending the completion of a Domestic Homicide Review.