Bad luck indeed. But considering what a good bicycle is worth, and considering what it IS
(foot powered transportation), anyone who is willing to risk felony arrest and jail for stealing one, probably needs it more than I do.
However, that being said, that doesn't make it right. There is never, EVER any excuse for stealing (the original Robin Hood was scum who should've been burned at the stake) If the thief is ever caught, you should show him no mercy, and be as ruthless as the law will allow to seek compensatory damages and/or punishment suffered on his part.