A man accused of murder told his trial that he realised about four months before the crime that one of his many personalities was discussing plans to kill his parents.
Ian Lee Christoffer Fok Lap-yin, 20, discussed his mental health as he took the witness stand at his Court of First Instance trial. Fok has pleaded not guilty to the murder of his father and attempted murder of his mother. Ex-schoolmate Chan Ming-tin, also 20, admits murder.
Fok told the court he began to suspect he had more than one personality while aged about 14 or 15, when he discovered 15 different MSN instant messenger accounts on his computer; he recalled setting up only two or three. The mystery accounts had friends in common with him and always discussed him.
In November 2012 - a few months before the March 16 attack on his sleeping parents at the family home in Pat Heung, Yuen Long last year - Fok found a new account with the name "foxylei911" on his computer.
"I didn't know Foxylei911, but from my experience, I knew that this person was also myself," Fok told the court. When he checked the account records, he found a discussion with a classmate, whom he did not name, about killing his parents.
Fok told the court he had long had mental problems. He felt he did not know what he was doing, and forgot things had happened.
"Sometimes I spent a day in school and I could not recall what I had done," he said. He sometimes had to ask friends what had happened. He told the court he would find drawings and maths notes he could not recall making, and at times used a video camera to record his daily life.
Fok said he used to fool about at school to attract attention. He tried to act more "normal" when he found that people teased him, but was still remembered as the class clown, the court heard.
He told the court his mental health worsened after failing some exams in 2012. He went to Taiwan to study, but returned after a month.
"I worried about how other people looked at me and commented on me," he told the court.
Earlier, the court heard from pathologist Dr Chiao Wing-fu. Chiao described the fatal injuries suffered by the defendant's father, Fok Lai-chi. He suffered 117 stab wounds, one penetrated his stomach near his ribs and his right kidney. Another cut a blood vessel near his armpit, causing massive bleeding.
Dr Chan Shun, who treated Fok's mother, Irene Fok, said she sustained four deep wounds to the back, damaging a lung. She also suffered a skull fracture from one of the knife blows.
The trial continues before Mr Justice Peter Line today.