Police are still trying to find out who stabbed a man to death in Croydon.
Mr Brown, 23, was attacked on Kelling Gardens at the junction with Bensham Lane.
Police believe the attack was carried out by two men who then ran along Bensham Lane towards Cameron Road.
Mr Brown left the scene on his bicycle but then collapsed. He was helped by a passing motorist who called an ambulance.
He was taken to hospital but died of his injuries a few days later on Monday April 3.
Detectives from the Met’s Homicide and Major Crime Command (HMCC) are investigating, but have so far made no arrests.
Det Insp Tom Dahri said: “I would appeal to anyone who witnessed this, or has any information, to come forward. Please do not hesitate, any information you have could be vital.
“Members of the public came to Bjorn’s help as he lay injured, I would ask the public to continue that support by contacting police or Crimestoppers.”
Anybody who has any information should call the police on 020 8721 4961 or Crimestoppers on 0800 555 111.