In a rare victory for journalism amid a crackdown on the news media in Hong Kong, the city’s top court on Monday overturned the conviction of a prominent reporter who had produced a documentary that was critical of the police.

Choy Yuk-ling, who also goes by the name Bao Choy, is best known in Hong Kong for producing investigative documentaries examining police conduct in 2019, when the city was roiled by months of anti-government protests.

Among the documentaries she produced was a prizewinning episode of "Hong Kong Connection,” a news program by the city’s public broadcaster RTHK. The episode examined who was behind a mob attack on a group of protesters and commuters in a train station on July 21, 2019, that left 45 people injured, and why the police were slow to respond.