The details according to the articles I have read are that he supposedly smashed a glass table with his shotgun and pointed it at his GF's face then called 911 when the cops first knocked on the door and claimed that the GF had gone crazy.
GF stated the above story to the cops. GZ said he didn't get the gun or do any of what she said and that she is crazy.
The GF needs to get one of those cams that you wear on your head at all times or something. I mean, the he said/she said thing has really worked out well for GZ in the past.