Gunman Picks Off Theatergoers Trying To Escape CPR News | By Renee Montagne, Ben Markus Published July 20, 2012 at 7:34 AM MDT Facebook Email Print Listen • 4:12 Authorities in Aurora, Colo., say a gunman wearing a gas mask set off an unknown gas and fired into the crowded movie theater. Police are searching the suspect's apartment. Copyright 2012 CPR News