The Brief Chicago police are investigating after apparent human remains were discovered in a South Side alley near 68th Street and South Prairie Avenue. William Hall is urging residents to stay vigilant, saying abandoned buildings continue to create opportunities for crime. Chicago police are investigating after what appeared to be human remains were discovered Monday morning in a South Side alley, a case that has renewed concerns among residents already shaken by another high-profile discovery earlier this month. ‘Disturbing’ discoveryThe backstory:Officers responded just after 9:30 a.m. to an alley near East 68th Street and South Prairie Avenue after receiving a report of what appeared to be human remains, according to Chicago police. What's next:Chicago police said the investigation remains active as detectives work to determine the identity of the person and how the remains ended up in the alley.