His father, Chris Sullivan, 65, previously told BBC London he had lost his only son who had recently overcome some health challenges, including being diagnosed with an autoimmune disease and going blind in one eye.
“All of his friends said he was the light, the leader. His friends’ parents loved him.
“This is why it’s so tragic,” he said.
A 25-year-man, who was arrested on suspicion of assisting an offender, has been released with no further action, according to the Metropolitan Police.
