After the murder of Choi came to light, the police first arrested three suspects on 25 February 2023. One of them was Choi's former brother-in-law Anthony Kwong Kong-kit (鄺港傑), who was her hired driver, while the other two were the first suspect's parents, who both used to be Choi's parents-in-law before she divorced her first husband Alex Kwong Kong-chi (鄺港智). After a citywide manhunt by police, Alex Kwong became the fourth to be arrested after he unsuccessfully tried to escape Hong Kong by sea. It was alleged that the death of Choi was masterminded by her former father-in-law Kwong Kau (鄺球), a former policeman who was previously accused of rape. The motive was believed to be a monetary dispute, and a luxury apartment believed to be bought by Choi and then put under her former father-in-law's name. The luxury apartment is located in
Kadoorie Hill in
Kowloon Tong, one of Hong Kong’s most prestigious addresses, and the neighbourhood is home to some of the city’s wealthiest people. On 26 February 2023, the police found Choi's severed head and several of her ribs inside a pot of cooked soup. At the same time, the police arrested a fifth suspect in connection to the killing, a 47-year-old Ng Chi Wing (伍志榮), a mistress of Kwong Kau. She was said to have helped hide Alex Kwong before his apparent attempt to flee Hong Kong. The search for the missing hands and torso and other body parts remained ongoing. More than a hundred officers were mobilized to search for the other missing body parts. The police searched through the North East New Territories Landfill in
Ta Kwu Ling for the missing hands and torso. They also questioned the villagers. DNA testing results revealed in March 2023 that the recovered head belonged to Choi. On 27 February 2023, the police proceeded with murder charges against Alex Kwong, his brother and father, while charging Alex Kwong's mother with
perverting the course of justice. All four suspects, who were officially charged in court, were denied bail and were held in remand pending investigations. Their cases were adjourned to 8 May 2023. Ng was charged with abetting a murder suspect, and she was released on bail. It also came to light that Alex Kwong was a suspect behind seven alleged cases of theft that occurred for nearly a decade before Choi was killed, and had once absconded despite being scheduled to appear in court in 2015. Kwong was charged in court for these cases as well. On 2 March 2023, a sixth suspect, 41-year-old Lam Shun (林舜), was arrested on suspicion of aiding and abetting Kwong's attempted escape for a payment of HK$300,000. Lam was an employee of a yacht rental company. Lam, who was charged on 6 March, was granted bail. A seventh suspect named Irene Pun Hau-yin (潘巧賢), a 29-year-old Hong Konger and friend of Alex Kwong, was also arrested in
Shenzhen, China on 7 March for abetting Kwong in his attempted escape from Hong Kong, and she was handed over to the Hong Kong authorities. Pun was charged on 8 March, and later granted bail of HK$50,000, but she was given a travel ban to prevent her from leaving Hong Kong. According to the laws of Hong Kong, a conviction for murder carries the
mandatory sentence of
life imprisonment. Originally, the
death penalty was the sole legal punishment for murder in Hong Kong before it was fully abolished in 1993. In another development of the case, Choi's mother filed a court injunction to forbid Kwong Kau from selling the property linked to her daughter's murder and to seek a declaration that her daughter was the beneficial owner of that apartment. A pre-trial conference was held on 8 May 2023, when six of the seven suspects behind Choi's murder appeared in court. The prosecution revealed that bloodstains matching to the DNA of Choi were found inside the car of her former brother-in-law, and over 30 exhibits seized by the police, including knives, chainsaws and hammers from the village, would be sent for DNA processing. In December 2023, Choi’s ex-husband and two of her former in-laws were additionally charged with preventing Choi's burial. In April 2024, Lam and Pun were jointly charged with perverting the course of justice by conspiring to assist Alex Kwong to escape Hong Kong. ==Suspects==