1 dead after at least 12 people shot at southwest OKC Halloween party, police say KOCO Oklahoma City1 Dead, 12 Shot At Halloween Party In SW Oklahoma City news9.com KWTVOne killed, 12 shot in SW Oklahoma City shooting KFOR Oklahoma CityAt least 1 killed and a dozen injured at Halloween party shooting in Oklahoma City NBC News1 dead, at least 12 injured in shooting at Oklahoma City party, police say CNN