One week on from the murder of 15-year-old Joseph Marafini in Wandsworth, detectives are appealing for anyone with information or footage to come forward.
Police were called at 4.58pm on Thursday, 29 October to reports of a fight outside a supermarket on Garratt Lane, SW18.
Two males were found near the Garratt Lane Burial Ground suffering from knife injuries.
The first victim was taken to hospital where he later died.
He was formally identified as Joseph Marafini, 15 , of Wandsworth.
The second victim’s injuries were not life threatening.
An investigation was launched by detectives from the Met’s Specialist Crime Command (Homicide) and Joseph’s family continue to be supported by specially trained officers.
A post-mortem examination found the cause of death to have been a stab wound to the neck.
Detective Chief Inspector Vicky Tunstall, leading the investigation, said: “This incident took place outside a busy supermarket and I am confident that there are people who saw the suspects, or witnessed the actual incident, but have not yet come forward.
“Were you shopping around the Sainsbury’s area of Garrett Lane at around 5pm on the day of the murder? Did you see a group of five young males around the Southside shopping centre and other retail outlets?
“Anyone with dash-cam, mobile phone or Ring.com footage of the suspects or the events before, during or after the murder should contact my team without delay.
“There are a number of ways you can assist our investigation – footage can be submitted directly to us online, or information can be passed to us by phone or anonymously through Crimestoppers.
“No matter how insignificant your information may seem, please do take the time to share it with us, it could be a missing piece in the puzzle, or it may confirm an existing line of enquiry and help us to clarify the circumstances surrounding Joseph’s death.”
Anyone who has information, video or images that could assist police should visit https://mipp.police.uk/