“The crime of rioting,” an officer says in the video.
“Me, taking part in a riot? The July 21 riot?” Mr. Lam exclaims. “Hong Kong has become so absurd now.”
A representative of the Democratic Party also shared a letter sent this month to the lawmaker from the commissioner of police that commended Mr. Lam for his response to the attacks.
“You’ve fulfilled your civic responsibility by reporting this serious crime to the police,” the letter, postmarked Aug. 3, said.
Mr. Hui, 38, frequently served as a mediator in street protests that erupted in the past year, issuing warnings to the police over a loudspeaker and encouraging protesters to go home safely. He filed a lawsuit against a police officer in June over the 2019 shooting of a protester, but the case was blocked last week by Hong Kong’s secretary of justice.
A few days after filing the suit, Mr. Hui was detained on suspicion of unlawful assembly, an accusation he described as retaliatory.
Elaine Yu contributed reporting.