Leung Kin-fai, was a Hong Kong merchandiser known for stabbing a 29 year old police officer in Causeway Bay and committing suicide immediately afterwards. From Wikipedia
The four were originally charged with advocating terrorism for passing a student union resolution mourning a man who attacked a police officer, but the charge was dropped as part of a plea deal; Judge Adriana Noelle Tse Ching admonishes ex-student leaders for open "defiance of the law," glorification of violence and failure to consider unrest potentially brought from their actions.