Police in Sydenham have arrested a second person suspected of murdering Nathan Murray.
The 21-year-old man is currently in custody at a south London police station.
Nathan, who was 18, was found suffering from a stab wound to the chest eight minutes after midnight on Monday in High Street, Sydenham.
He died just over a day later.
A 16-year-old girl from Lewisham was arrested on 1st June for grievous bodily harm with intent and re-arrested the following day on suspicion of murder.
She’s been bailed to return to a south London police station pending further enquiries.
Detectives from the Homicide and Major Crime Command (HMCC) are investigating.
Anyone with information is asked to contact the incident room on 0208 721 4961. If you wish to remain anonymous please call Crimestoppers on 0800 555 111.