On a Sunday night in October 1891, Chicago police officer George Schlinger was killed by an assailant during an arrest at Randolph and Peoria streets. Today, 123 years later, Schlinger’s name and badge are on display along a busy stretch of Michigan Avenue. His story was the inspiration for one of the horse statues dotting the city as part of the Horses of Honor installation benefiting The Chicago Police Memorial Foundation, which helps families of officers killed or catastrophically injured on the job. For …