The man shot dead in a "targeted" attack in Uxbridge on Tuesday night (February 3) has been named by police as father-of-three, Redwan El-Ghaidouni.
While formal identification is yet to take place, detectives named the 38-year-old, of Vine Lane, Uxbridge, on Wednesday night.
It is believed the car dealer was shot in a "targeted" attack outside his home.
Officer have also released a description of the suspect as they continue to appeal for witnesses and information following the shooting, at around 7pm, in Vine Lane, on Tuesday.
Detective Chief Inspector Noel McHugh, leading the investigation for the Homicide and Major Crime Command, said: "At this stage there is every indication that this was a targeted act and not in any way random.
"Myself and my team are very keen to hear from anyone who either witnessed, or has information concerning the death of Redwan in these most violent of circumstances.
"Anyone who assists officers by providing information can be assured that any contact they make will be treated in the strictest of confidence."
Police were called to the incident on Tuesday by the London Ambulance Service (LAS) and found Mr El-Ghaidouni suffering from gunshot wounds. He was pronounced dead at the scene less than an hour later.
It is believed the victim was inside his parked car on the driveway of his home, in Vine Lane, when he was approached by a lone male suspect who then fired a number of shots into the vehicle before making off on foot through an alleyway which leads to Saunders Road before running off in the direction of Honey Hill.
The suspect is described as a male wearing a dark hooded top with a large motif on the front, light-coloured bottoms, dark gloves and dark shoes or trainers.
Neighbours near to the scene reported hearing gunshots, like "fireworks", on Tuesday evening and were left shocked by the incident.
Anyone with information is asked to call the incident room on 020 8785 8099 or Crimestoppers anonymously on 0800 555 111.
Police enquiries continue and no arrests have been made.