Anthony Kwong describes aftermath of Abby Choi's death in Tai Po

When asked why he didn't contact authorities, Kwong said both people in his car were members of his family, and did not think of alerting the police at that point.

He added that he should have been more rational and directly confront the situation, which could have prevented it from worsening.

Kwong said when his father boarded his vehicle at Tai Mei Tuk, Alex Kwong was found to be zoning out while Choi laid on the car's carpet without moving or making any sounds.

Anthony Kwong noted Kwong Kau tried to touch Choi in a bid to check for a heartbeat, while he himself avoided looking.

Kwong Kau then said they should all return to the Lung Mei Village unit, after which they drove to the destination separately.

After arriving, Kwong Kau took out a white plastic box earlier purchased by Anthony Kwong from his car and asked the latter to hold it for him.

The pair then walked to the unit's front door.

When asked whether he knew what was about to happen, Anthony Kwong said many things happened and that he only listened to his father's instructions at the time.

Asked whether he knew what to do with the box, Anthony Kwong said his father did not communicate with him, emphasising that he was aware of the situation and guessed Choi was supposed to be placed inside.

Anthony Kwong later said owing to the lack of space in his car, he could only see Choi lying on the floor and could not see her face.

When asked if he believed Choi was still alive at the time, Anthony Kwong said she showed no signs of life and was not breathing for nearly half an hour, and believed she already died.

He said after he tried calling his mother, he returned to his car and saw Kwong Kau wrapping Choi with a blanket before placing her in the plastic box.

This as a piece of CCTV footage from Lung Mei Village was played in court, showing Alex Kwong and Anthony Kwong chatting after getting off their vehicle.

The trio then carried the box containing Choi inside the unit, after which Kwong Kau told his two sons to leave while he handled the situation.

After returning to the unit later in the evening, Anthony Kwong said he noticed blood on a chainsaw, adding that he did not know what to say to his father at that point.

When asked why there was blood on the chainsaw, Anthony Kwong said be believed it was used to dismember Choi's body.