Detectives investigating the fatal stabbing of a teenage boy say they are “making positive progress”, as two photographs of the victim were released by police.
Louis-Ryan Menezes, 17, from Rothwell in Northampton, was fatally wounded after being stabbed in the chest on Friday.
He was pronounced dead after being taken to Northampton General Hospital following the incident at Drayton Walk, Kingsthorpe, Northampton, at 6.15pm.
Two boys aged 15 and 16 and a 38-year-old man detained in connection with the inquiry on Saturday were subsequently freed without charge.
But police said house-to-house inquiries in the area have provided fresh lines of inquiry.
Detective Superintendent Neil Castle, who is leading the inquiry, said: “We have had a lot of co-operation from members of the community who have been talking to us and providing us with many lines of inquiry to investigate.
“Officers have been conducting house-to-house inquiries in the area over the weekend and we are making positive progress.”
A large-scale investigation remains under way, led by the East Midlands Special Operations Unit (EMSOU) major crime team, with 50 officers working on solving the crime.
Witnesses are asked to call police on 101. Anybody wishing to remain anonymous can call Crimestoppers on 0800 555 111.