Jake Bleiberg, Gene Johnson And Lolita C. Baldor, The Associated Press ALLEN, Texas (AP) - The mass shooting at a suburban Dallas shopping mall lasted three to four minutes before a local police officer shot and killed the gunman, authorities said Tuesday. The Allen police officer who shot and killed 33-year-old Mauricio Garcia acted heroically and saved “countless lives” through his quick action, Hank Sibley, the regional director of the Texas Department of Public Safety, said at a news conference. He said the officer is still processing what happened and isn't ready to have his name made public. The investigation...