I am very keen to trace this vehicle and would appeal to anyone with information to give my team a call.
Did you see the car in the area of the murder at around midnight on Saturday into Sunday (30 December)?
If you believe you may have seen this car anywhere subsequently, I would also urge you to get in touch as soon as possible.
More top news
Six fire engines and 35 firefighters are fighting a fire in a storage unit near Heathrow Airport.
A woman was taken to hospital by air ambulance after falling from one of Trafalgar Square's famous lion sculptures.
Police are appealing for help in tracing a family of six who are feared to be travelling to Syria.