James D. Bradley, 34, of Chicago was found dead from gun violence on December 28, 2014. His body was discovered inside a vehicle in the South Austin neighborhood during a weekend that saw multiple shootings across the city.

Those who knew Bradley remembered him in online memorials as respectful and family-oriented; reports say he worked as a truck driver and provided for his family. His killing was one of several incidents that weekend that added to Chicago’s struggle with gun violence and to ongoing efforts by authorities to investigate and address the surge in shootings.

Are there details about Bradley’s movements that day or witnesses who haven’t yet come forward?