Bad enough that he also had thoughts of killing his brother, after dismembering his parents and cooking them, Henry Chau had also wanted to travel to mainland China and kill other people as well.

This was testified by Henry’s cousin Siu Wing-kwan, in the former’s ongoing murder hearing yesterday, the South China Morning Post reported.

Henry, a 30-year-old self-proclaimed “psychopath”, had apparently admitted to Siu on the night before police arrested him on March 15, on having murderous thoughts about his (Henry’s) brother, Chau Hoi-ying.

Siu, a prosecution witness in the Court of First Instance, testified that she had met with Henry in Tsim Sha Tsui, where he told her he wanted to end his life before 30, but then changed his mind after meeting his friend, 36-year-old Tse Chun-kei or “Ah Kei”, and decided he wanted to kill others instead.

"He had wanted to kill himself because he disliked his parents, who had too many expectations of him that he could not fulfil," Siu said.

"He claimed his father used to hit his brother, and his brother then hit him. So he also hated his brother.

"He thought of setting his brother as the next target, but gave up the idea eventually, as his brother had treated him well over the week," the report quoted Siu as saying.

Prosecutors showed the court a WhatsApp message Henry sent to his friends where he called himself a “psychopath” who “cannot empathise with people’s pain”. The message was sent before he met up with Siu.

Siu said in her talk with Henry, she understood that her cousin had killed his parents. She said, Henry first disposed his parents’ body parts into the sea, but they floated, so he decided to put the remains in lunchboxes instead and threw them away like rubbish.

"He told his story in a very calm manner. I got the feeling that he was quite proud of his disposal of the remains of the bodies without being found," Siu said in the report.

Quoting Henry’s 35-year-old brother, Hoi-ying, who also testified in court, the report said: “He lives in his own world, thinking his own way. He thinks the world owes him.”

Hoi-ying said he didn’t realise that when he heard his parents talk on the morning of March 1, that would be the last time he heard their voices.

He said he approached his brother on March 5 when he did not hear from their parents. He said, Henry told him that their parents had visited the mainland for leisure purposes on March 2, and suggested their phone batteries were dead.

Hoi-ying, who admitted to not having very good ties with his brother, said he called relatives and friends before lodging a police report on March 9.

Together with Tse, Henry has been charged with murdering his parents, Chau Wing-ki, 65, and Siu Yuet-yee, 62, in Tse’s home in Tai Kok Tsui flats, Kowloon, Hong Kong, in March last year.

The duo had denied the joint murder charges.