A mental patient who was released into the community has admitted killing his neighbour in a north London street.
Philip Theophilou, 35, denied murder but admitted manslaughter on the grounds of diminished responsibility.
Father-of-two Simon Breed, 51, of Wood Green, was stabbed in the back and chest during the attack in April 2004.
Theophilou had been sectioned under the Mental Health Act in 2003 and sent to a secure hospital, but was later released into the care of a mental health trust.
He was spotted by officers in Hyde Park three days after the killing in April 2004.
His plea of not guilty to murder was accepted during his appearance at the Old Bailey.
Theophilou, who is being held at Broadmoor, was remanded for further psychiatric assessment and will be sentenced on 24 June.
Marjorie Wallace, chief executive of the mental health charity SANE, said: "The public need to have confidence that the psychiatric services will properly assess the risks that people may pose to themselves, and very occasionally others, and that all those responsible for an individual's care have been given vital information".
She added: "Without this, tragedies such as this will further increase the stigma for the majority of people with mental illness who are never violent."