A pensioner who was attacked while working in his garage died from a stab wound to the heart, a post mortem confirmed.
Leonard Flower, 67, was attacked in Carnegie Gardens on Tuesday afternoon and was pronounced dead at the scene.
A 35-year-old man was arrested in connection with the murder but detectives have released him into hospital care while he undergoes medical treatment for an injury to his hand.
As a result the custody time clock has been put on hold and will restart once he is returned to the police station.
Det Chief Inspr Jason Gordon from the BCHMCU said: “While the suspect undergoes medical treatment we continue to piece together the events that led up to the murder of Mr Flower. This was a violent incident that has left a family in total shock, but it is important we work very closely with our health colleagues to ensure the right and proper processes are followed while ensuring the course of our criminal investigation continues undeterred.”
Mr Flower, known as Len, was a retired computer analyst and lived with his wife of 47 years.
They have two grown up daughters.
They respectfully request they be left alone to deal with the shock and grief they are experiencing and do not wish to be contacted by anyone at this time.
Anyone with information is urged to contact Bedfordshire Police, in confidence, on 101, or text information to 07786 200011.
Alternatively, contact the crime fighting charity anonymously Crimestoppers, anonymously, on 0800 555 111.