A man has been arrested on suspicion of murder after a man was shot dead in a car in west London.
Hashim Abdalla Ali, 22, was in the passenger seat of a parked Mercedes when he was shot at 14:37 BST in Central Avenue, Hillingdon, on 11 October.
The driver tried to get him to hospital but crashed in Uxbridge Road on the way, the Met said.
A 27-year-old man has been arrested at an address in Birmingham.
Police who attended were initially responding to reports of a car crash, but then found Mr Ali in the car with a gunshot wound.
He died at the scene despite paramedics trying to save him.
Detectives want to speak to anyone who was in the area between 14:30 and 14:45.
A Met spokesman said: "It is a quiet area and it is likely that people would have heard the gunshot."
The BBC understands the fatal shooting was the 13th in London this year.