"Girlfriend of Las Vegas gunman said she had no warning about massacre"
Of course she didn't.
If the shooter gave a hint to Marilou Danley of what he was about to do to and she did not say anything, either out of fear for her safety or disbelief, you bet she is going to swear up and down she didn't have a clue this was about to happen.
If she says anything else, all hell would break loose on her.