1 Dallas police officer killed; 2 others hurt in Oak Cliff shooting FOX 4 News Dallas-Fort WorthSuspect who fatally shot Dallas police officer and wounded two others identified by police The Dallas Morning NewsDallas police shooting suspect: Here’s what we know about Corey Cobb Bey FOX 4 News Dallas-Fort WorthOfficers Injured, One Officer Killed In the 900 block E. Ledbetter Drive DPD BeatFather of suspected Dallas police shooter said his son had been acting strange recently WFAA.com