A third man has been arrested in connection with the Oliver Tetlow murder last Wednesday (March 9).
Detectives investigating the murder announced that they have arrested a 24-year-old man on Monday (March 14) morning on suspicion of murder.
The other two men arrested in connection with the investigation , are a 29-year-old and 18-year-old, who were arrested on Friday (March 11).
A post-mortem examination at Northwick Park Hospital gave the cause of death as gunshot wounds.
Metropolitan Police believe the shooting was gang related and Oliver Tetlow wasn't the intended target and was a “tragic case of mistaken identity” .
Officers from the Homicide and Major Crime Command say they are continuing to appeal for witnesses and information and appeal for anyone who may have images or footage of the shooting to contact the incident room on 020 8358 0200 or contact Crimestoppers on 0800 555111.