It has emerged the 24-year-old woman who was fatally shot in Kilburn on Saturday was a nursery teacher.
Sabrina Moss, who had a four-year-old son, was on a night out celebrating her birthday when she was killed.
Police have now arrested a second man in connection with her murder.
Another woman, who was also shot, is in a stable condition in hospital.
More top news
A retired judge will lead the public inquiry into the Grenfell Tower disaster, the Prime Minister has confirmed.
They tried to drive off, pursued by the suspect on foot, before their car crashed into a fence.
"Three were standing together almost shoulder-to-shoulder in like a little wolf pack and they're staring at me...", said PC Wayne Marques.