Phyllis Duncan, founder of Mathers of Murdered Sons (Scott Olson/Getty Images)

As America discusses gun control policy in the wake of the Newtown, Conn., school massacre, a related problem of gun violence continues to rage in the Midwest. Chicago, the city where a bloody shooting spree left 13 injured in 30 minutes in August, saw another of its citizens murdered last night. Nathaniel Jackson, who was pronounced dead early Friday morning, marks the 500th death in the city this year, according to USA Today

On Thursday, officials with the Chicago Police Department said the city was one homicide away from the 500 mark. Hours later, a 40-year-old man was fatally shot in the Austin neighborhood on the city's West Side. Police say Nathaniel Jackson was found on the sidewalk outside a convenience store with a gunshot wound to the head late Thursday.

Read more at USA Today.