Gary Allan's wife suffered from severe depression. One night, she was in bed suffering from a migraine headache brought on by the depression. She asked Gary to get her a drink. As he walked out of the room, she shot herself committing suicide - with their kids in the house. The episode greatly impacted his music. About three years after the event, he penned this song. It was healing.
http://www.youtube.com/watch?v=V1CTCeiJOds