Chang Z. Qui, 41, was working the evening shift at See Thru Chinese Kitchen on the 5200 block of West Madison Street in Austin when a robbery turned deadly on Halloween, October 31, 2014. Around 7 p.m., a gunman entered the small carryout, demanded money and, amid the chaos, shot Qui in the back as he worked. He was taken to Mount Sinai Hospital and pronounced dead at 8:02 p.m.

Qui lived on the 3200 block of West Wallace and commuted to the restaurant; his death left both neighborhoods reeling and prompted online memorials calling him another life lost to gun violence. Police added the case to the city homicide rolls and investigated the scene and witnesses at the restaurant that night. In February 2015 Chicago police announced an arrest in the case, charging a 26-year-old West Side resident, Deshawn Johnson of the 5200 block of West Quincy Street, with first-degree murder, multiple counts of attempted murder and several counts of armed robbery related to this incident and a separate holdup.

Did anyone who worked at or visited See Thru Chinese Kitchen that night see something that could help resolve unanswered questions about who entered the restaurant?