Carvis L. Milon, 42, was fatally shot on April 4, 2015, in Chicago’s Auburn Gresham neighborhood. He was standing on a sidewalk at about 4:15 p.m. when gunfire struck him; despite attempts to save him, he died at the scene. The killing occurred over an Easter weekend that saw a broader spike in citywide shootings that year.

If anyone in Auburn Gresham that day remembers seeing something relevant to Milon’s death, those observations could still matter to investigators.