1 Dallas police officer killed; 2 others hurt in Oak Cliff shooting FOX 4 News Dallas-Fort Worth3 Dallas police officers shot, 1 killed, after finding officer shot in marked squad car CNNDallas police officer and suspect killed in shooting FOX 4 News Dallas-Fort Worth1 officer dead, 2 officers injured in Dallas shooting; suspect dead, police say USA TODAYDallas police officer killed, 2 other officers wounded in shooting The Dallas Morning News