Officers are returning to the scene of a murder in Harlesden to appeal for witnesses and information whilst a £10,000 reward is now being offered by the independent charity Crimestoppers.
James Owusu-Agyekum, 22, of Harlesden, died following a shooting in Tynsdale Road, NW10 on Wednesday, 2 November.
Officers were called by the London Ambulance Service at 22:45hrs to a shooting in Tynsdale Road, NW10.
Local officers and firearms officers attended the location and found James with gunshot injuries. He was pronounced dead at the scene.
Formal identification has taken place.
A post-mortem examination on Friday, 4 November at Northwick Park Hospital Mortuary gave cause of death as gunshot wounds.
Detectives from the Homicide and Major Crime Command (HMCC) are investigating.
No arrests have been made and enquires continue.
On Wednesday, 9 November officers will be in the area appealing for information on the murder and speaking to local residents.
Detective Chief Inspector Nicola Wall of the HMCC, leading the investigation, said: "We are appealing for anyone who may have been in the area to come forward and speak to us.
"There may have been pedestrians or motorists in the area passing through at the time of the shooting or witnesses who hold a valuable piece of information. I would urge them to come forward as soon as possible."
A £10,000 reward is being offered by Crimestoppers and will be available to anyone providing information to Crimestoppers leading to the arrest and conviction of any person or persons responsible for the murder of James Owusu-Agyekum.
Contact can be made via the Crimestoppers number of 0800 555 111 or the secure online form which can be found on the Crimestoppers website www.crimestoppers-uk.org
Callers to Crimestoppers give their information anonymously and only information given to Crimestoppers will be eligible for the reward.
Anyone who witnessed the incident or has information that may assist police can also call the Met Police incident room on 020 8785 8244.