Ira A. Cotton, a 56-year-old former Cook County correctional officer, was shot and killed during an attempted robbery on May 11, 2016, on Chicago’s South Side. The shooting occurred while Cotton stood on the front porch of a friend’s house in the Greater Grand Crossing neighborhood; he had been visiting to help plan a community fundraiser.

Cotton’s background as a retired correctional officer was noted as making his loss especially striking, since it underscored that the year’s gun violence affected a broad cross-section of residents and visitors.

Does anyone have information about the May 11, 2016 attempted robbery or remembers activity in that block that day?