Like the others, i'd like to offer my condolences, and I fully understand your question, in the light of whats happened.
Sometimes these things can rock your faith right to the very bottom, and sometimes, they can make you pull together, and strengthen your faith,
Others have heard this before, but i'd like to repeat it here.
I lost a brother, four years old, to an unlicensed driver, my parents faith kept them going, and gave them a lot of comfort, me. even now I ask why?, but my point is, if you normally go to church, talk to some of the people there, they'll understand your dilemma, and even if it doesn't help with your question, it most surely will be of some comfort.