CHICAGO — The Chicago Police officer who shot and killed 13-year-old Adam Toledo during a foot chase in 2021 is facing firing after an investigation by the Civilian Office of Police Accountability concluded the shooting violated department policy. COPA’s findings against Officer Eric Stillman were discussed Thursday nightby the Chicago Police Board, as was the fact that police Chicago police Superintendent David Brown contested the findings, saying that the shooting did not violate department use-of-force rules. Brown only agreed with COPA that Stillman violated department protocol for failing…