Ramane Wiggan, 25, was shot in West Norwood, Lambeth, and died at the scene around 4pm.
The “lovely” man, from nearby Tulse Hill, was earlier today confirmed as the victim of the shooting.
Met Police detectives have now released a photo of Ramane and said formal identification will take place next week.
Ramane was shot in Friar Mews, West Norwood, and died around half an hour later as paramedics fought to keep him alive.
“He was a good boy. He was lovely, always smiling”
A police spokesman said: “Next of kin have been notified.
“While formal identification will take place on April 1, the family are content for the deceased to be named.”
Two 27-year-old men were arrested on suspicion of murder but have been released on bail to a date in late April.
Inquiries are ongoing, and police urged members of the public who saw the shooting or have information or dash cam footage to come forward.
It comes as around 15 friends and members of Ramane’s family went to the crime scene last night to lay flowers and light candles to pay their respects.
His aunt said: “He was a good boy. He was lovely, always smiling.”
Tributes were left on the bouquets by relatives.
One tribute left on the flowers read: “To my beautiful nephew, gone but not forgotten.”
Another said: “To my cousin, I will cherish my memories of you and will truly miss you.”
A further one read: “Rest in peace. Will miss you always, Auntie Pauline and family.”
Residents living near the murder scene told of their shock earlier this week.
One woman had been told that the victim was “covered in a pool of blood”.
She said: “The woman who lives in that flat said the victim was covered in blood. There were bullets on the floor.
“She spoke to me about what happened. She said a neighbour was performing CPR on the victim.
“She was outside her front door when this happened.”
Another woman said: “It appears he’s been shot right outside a front door on the top floor of the flat.
“This is horrific. I live in a house just yards away. It’s a tragedy. Crime is out of control in London.
“We’ve heard people inside the block tried to resuscitate the man and save him. They tried their best but couldn’t.”