Steven Brown’s daughter Shenell, 18, said: “I still can’t believe that he is gone. Somebody out there knows who did this to him.”
Mr Brown, 47, was ambushed and stabbed by a group of men in Stoke Newington on April 17 last year.
He staggered 100 yards before collapsing outside a builders’ merchants in Matthias Road with a knife wound to the heart. Paramedics and police fought to save his life but he died at the scene.
Detectives believe he had been targeted by a group over a dispute. Scotland Yard said 13 arrests have since been made, but no one has been charged over his “horrific” killing.
Shenell added: “People in the community talk but they need to talk to the police so that they can arrest those responsible for killing my dad.
“I miss him so much. It’s unfair that the people who did this to him think they have got away with it.”
Crimestoppers has offered a £10,000 reward for information leading to the arrest and conviction of those responsible.
Detective Chief Inspector Paul Considine said: “Steven was attacked by a small group of people in Cowper Road. Bravely, he managed to pick himself up off the ground and stagger to Matthias Road where he eventually succumbed to his injuries.
“I believe Steven may have known the perpetrators and the motive for the assault was over some dispute between them.
“The attack took place on a residential street in the early evening, when many people would still have been out and about. I am convinced that there will be members of the community who know who is responsible for this horrific act that has left Steven’s family devastated. They cannot begin to recover from the grieving process until they see justice served.”
The Met’s Specialist Crime Command asks anyone with information to contact them on 020 8345 3865, or by calling Crimestoppers on 0800 555 111.