Vincent Winkfield, 28, was shot in the head on August 12, 2016, in the 400 block of North Lavergne Avenue in Chicago’s South Austin neighborhood. He was taken to Mount Sinai Hospital in critical condition and died of his injuries on August 15, 2016, the Cook County medical examiner’s office confirmed; the death was ruled a homicide.

Federal investigators later linked the gun used in Winkfield’s killing to a larger illegal firearms trafficking ring that moved weapons purchased in Kentucky into Chicago. Prosecutors said the trafficking group—tied to a violent faction of the Conservative Vice Lords—moved roughly 90 guns from Kentucky to Chicago, selling them to gang members. The firearm used in this shooting was reportedly bought in Kentucky just days before the murder. Three men—Christopher Henderson, John JoJo Phillips, and Jaiqail Wright—were charged in the trafficking case, but no one had been identified or arrested specifically for Winkfield’s shooting as of the latest report.

Anyone with information about Winkfield, his movements on August 12, 2016, or the shooting is asked to come forward.