Looks like it has been ruled murder/suicide. Link: http://www.nfl.com/news/story?id=09000d5d8113375c&template=without-video-with-comments&confirm=true Some details on the relationship between McNair and Kazemi here: http://www.nfl.com/news/story?id=09000d5d8112aed8&template=without-video-with-comments&confirm=true
Why did it take so long for them to call it a murder-suicide? Its not like he shot her and then shot himself 4 times.