The slaughter began shortly after noon on June 3, 1982, when Lee Chi-hang stabbed his mother and sister to death at their flat in Shamshuipo. He raced down the stairs, a knife in each hand, and stabbed two women who got in his way.
He then kicked open the door of Anne Anne Kindergarten where 60 children were singing. He slashed 34 children, almost severing the arms of six of them. Then he raced through the playground, wounding four more people before he was shot by a policeman.
Casualties: five dead, including three kindergarten children, and 42 injured.
Lee, now 44, is spending his 16th year at Siu Lam Psychiatric Centre in Tuen Mun. His father Lee Chiu visits him once a year.
During his visit last May, he was accompanied by an official from the Mental Health Review Tribunal, which reviews his son's case annually to determine whether he can be discharged.
Modelled after the British system, the Mental Health Review Tribunal in Hong Kong was established in 1960 as an independent body to 'ensure against unjustified hospital detention' in cases of mental illness. The tribunal's powers were broadened in 1989; it now reviews cases of patients confined to hospital on judges' orders.
The tribunal has 34 members, including doctors, judges, psychiatrists, clinical psychologists, social workers and laypeople. When mentally ill offenders are sentenced indefinitely to a mental hospital, their cases are automatically reviewed by the tribunal once a year - even if they have not made a request for a re-appraisal.