At least three men were killed and another five people were wounded across Chicago as the Fourth of July weekend got underway.. On one block in the Back of the Yards neighborhood, a man was killed and another man was wounded about nine hours apart in shootings at the corner of 49th and Justine streets. Police said both men belonged to the La Razas gang, which has been fighting with a gang to the north in a small pocket of the Back of the Yards called "Halo City.”