[11] On 13 November 2019, a conflict between opposing groups took place on Lung Wan Street, outside the North District Town Hall, in Sheung Shui.

[3][10][12][15] The protesters were dressed in black,[6][8][12] wore masks over their faces,[6][14][33] and carried umbrellas, a signature accessory of the movement.

[14][43] They initially wanted to remain anonymous, citing concern for their personal safety,[14][43] but eventually went public, guided by the Hong Kong Federation of Trade Unions (HKFTU).

[42] Over one hundred thousand people from mainland China, including Chinese actor Huang Xiaoming, donated funds set up in support of the families of Luo and a 57-year-old man named Lee Chi-cheung who was set on fire during an argument with protesters.

[6] The Hong Kong Government said in a statement that they were saddened by the incident and that the police would work to bring the offenders to justice.

[10] The Food and Environmental Hygiene Department released a statement, expressing profound sadness at the passing of its service worker and saying it was providing assistance to his family.

"[12][6] They reiterated their support for the Hong Kong government and police force, urging them to punish the culprits sternly in accordance to the law.

"[6][18] In a commentary in the Chinese state-owned news agency Xinhua, this fatal incident was cited as one of the examples highlighting the violence perpetrated by "black-clad rioters" besetting Hong Kong's society.

[47] The case was initially classified as a wounding, and assigned to the New Territories North Regional Crime Unit.

[3][12][4] After police reviewed CCTV footage,[6] and noting that some nearby cameras had been damaged by protesters,[41] Senior Superintendent Chan Tin-chu told reporters that "Those in black first threw metal rods and bricks at the residents while Luo was believed to have used a mobile phone to film the scene.

[50] Two male teenagers were then charged, initially with murder (as accomplices under the doctrine of joint enterprise) but reduced to manslaughter by the judge, after she saw the evidence.

[54][55][56] The police said that the two were among six people — three male and three female, aged 15 to 18 — arrested in December in connection with Luo's killing.

[57] In July 2022, Chan Yin-ting and Lau Tsz-lung were unanimously cleared of manslaughter and wounding charges but convicted of rioting, following a jury trial.