Prior to the one year anniversary of the 2019 Yuen Long attack, Bao Choy led the production of documentary "Hong Kong Connection: 7.21 Who Owns the Truth?" which aired in the programme "Hong Kong Connection" in July 2020 for public broadcaster Radio Television Hong Kong. It won two awards in Hong Kong. She tried to discover the owners of a few vehicles suspected of supplied weapons to the attackers who launched an indiscriminate attack on scores of people. She checked a box to declare that the vehicle registration searches were for "other traffic and transport related matters". Other options available when accessing the database are "legal proceedings" and "sale and purchase of vehicle". Previously, however, journalists had been able to declare that their searches were for "other purposes". Choy was arrested on 3 November 2020, and her home in Mei Foo was searched by police. She was found guilty and given a HKD$6,000 penalty.