A backlash against those laws by gun-rights advocates followed , and there was only limited action on a federal level after a Republican filibuster blocked expanded background checks for gun buyers . State attorney drops appeal of court 's decision to release the recordings . CNN had requested the audio files be released . The 2012 shooting left 20 people dead , including 26 children . It 's the second -deadliest shooting in Aurora history .
State attorney drops appeal of court 's decision to release the recordings . CNN had requested the audio files be released . The 2012 shooting left 20 people dead , including 26 children . It 's the second -deadliest shooting in Aurora history .