Sam Walker Sr., a 34-year-old African American man, was shot and killed on July 31, 2014, in the Humboldt Park neighborhood of Chicago while walking to pick up cigarettes after getting a haircut. He was struck in the torso and head and pronounced dead at the scene.

The killing came days after his 13-year-old son, Samuel Walker Jr., was fatally shot in a drive-by outside a West Side convenience store on July 25, 2014. Both father and son were reported to have been affiliated with the Vice Lords street gang, though it was not clear whether either shooting was gang-related.

The double loss prompted an extensive investigation by the Chicago Police Department and a joint funeral for the father and son. Does anyone have information about the shootings or remember seeing either of them around Humboldt Park or the West Side in late July 2014?