CHICAGO — Authorities on Monday were trying to piece together how a suburban Chicago police officer ended up fatally shooting a black security guard who was detaining a suspected gunman who opened fire at the bar where he worked moments earlier. The 26-year-old armed guard, Jemel Roberson, was pinning down the suspect outside Manny’s Blue Room in Robbins, Illinois, early Sunday when an officer dispatched to the scene opened fire on … Continue reading Police officer near Chicago fatally shot security guard who was detaining a suspect