A 22-year-old man has been arrested on suspicion of the murder of Micah Urquhart.
It is the third arrest in the investigation into the 19-year-old’s death.
Micah, who lived in Hastings Street, died from a stab wound to the heart and was found by a member of the public in Hastings Street on Friday September 13.
Two men have already been charged with murder and remanded in custody.
Leading the inquiry, Det Chief Insp Sharn Basra, of the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, is continuing to appeal for witnesses to the incident to come forward.
DCI Basra said: “Although we have made significant progress with this inquiry and have charged two individuals, we continue to investigate Micah’s death and will pursue every lead possible.
“Detectives are continuing to piece together Micah’s last movements – we know he was last seen leaving his home address in Hastings Street at 3.30pm on Thursday afternoon (Sept 12) as he was heading on foot towards the town centre. It is important that anyone who saw or heard from him from 3.30pm on Thursday until 12.40am on Friday should contact the inquiry team as soon as possible.
“A great number of witnesses have already come forward to provide us with information but I would urge anyone else who was in the Hastings Street area at the time and has not yet spoken to us to get in contact.”
Detectives are still looking for four men who were seen going in to an alley way which runs between two houses that have been converted in to flats in Hastings Street.
It is believed one of the men then returned to the entrance of the alley way and turned right towards The Butcher’s Public House where he stands and is joined moments later by another member of the group.
Both men are then joined by the remaining two group members before they all leave the scene towards Elizabeth Street.
All the group are described as wearing hooded tops; one is described as black and another is described as a white man with short straight ginger hair which was brushed forward.
Two other men were also seen on CCTV in the area at around the time of the incident. They are seen walking from Hastings Street towards Windsor Street.
DCT Basra said: “These people may be vital witnesses to the incident and I need them or anyone who can help identify
them to contact the police urgently.”
Anyone with information relating to this investigation can contact the Major Crime Unit on 01707 355666, or Bedfordshire Police, in confidence, on 101, or text information to 07786 200011.