Brandon Gonzalez, 19, was shot and killed during an apparent drug transaction that turned into a robbery in the early morning of July 24, 2014, inside a vacant house in the 7300 block of Vermont Avenue in the Carondelet neighborhood of St. Louis. Investigators say gunfire struck Gonzalez in the chest and neck; he was taken to a hospital and pronounced dead. A 21-year-old companion was also shot in the chest and neck and survived in serious but stable condition, while another 19-year-old present escaped unharmed.

Detectives identified multiple suspects and described the robbery as carried out by a group of at least six people. Two teenagers were arrested in the days after the killing: 18-year-old Samuel Vazquez-Gonzales, charged with first-degree murder, assault, and robbery, and 17-year-old Terence McKinney, charged with second-degree murder, first-degree assault, and armed criminal action. In January 2016, a judge sentenced McKinney to 15 years in prison for his role in Gonzalez’s death and the assault on the surviving victim.

Does anyone have information about who else may have been involved or about the people present that night?