Oh man that really really sucks. Read what Pocahontas wrote, because after what happened to you, I'm not about to do that and it may help a lot. Sadly, this was something that may have been better if prevented and may be impossible to rectify. Next time keep things like that hidden in your car (I have to do that to my iPod). Also, I'm sure you know this already, but DC is a very bad crime place.
Good luck with any help you can get.