56-year-old Lai Man Wa, the first ever customs Chief of Macau, was found dead on October 30, 2015, with her wrists and neck slashed and a plastic bag over her head, prompting Macau's  Secretary for Security Wong Sio Chak to summon an emergency meeting. She and her husband came from very loyal leftist patriotic families.

Lai Man Wa joined the Public Security Force of Macau in 1984 and worked for the marine police the following year. Since March 1999, she had been given various leadership roles, including deputy director of the Marine Police Bureau and deputy director-general of customs. She was appointed customs chief in December 2014 when Chui staged an unprecedented major reshuffle of has cabinet in a bid to meet challenges laid down by Xi to clean up the gaming industry and diversify its economy.