The near collision Tuesday evening was attributed to an error by an air-traffic controller who directed an eastbound Midwest Airlines plane to descend into the path of a westbound United Express jet, according to a preliminary investigation by the Federal Aviation Administration.
The controller, a 26-year veteran, appeared to have forgotten about the United Express plane after he mistakenly removed its electronic identification tag from his radar screen in preparation to hand off the plane to controllers in a different air sector, officials said.
http://www.chicagotribune.com/news/local/chi-nearmiss_15nov15,0,1827057.story?coll=chi_tab01_layout
Pilots avoid near-miss collision over Indiana
http://www.suntimes.com/news/metro/652270,nearmiss111507.article
No. The TCAS warning alerted the pilots so they avoided a Near Mid Air Collision. If they avoided a near miss they would have hit.