Sorry to use this tragedy for an opportunistic but related comment.

If you have had past struggles with suicidal thoughts, or depression combined with addiction, then you should not own a gun. You might feel fine today, but relapses happen.

Other ways to attempt suicide are less fatal and more complex, giving you more chances to back out.

Harvard on the, powerful link between gun ownership and suicide: http://www.hsph.harvard.edu/news/magazine/guns-and-suicide/