Well at least make sure they are not visible. I mean maybe you hid them tho. That's sucks man. My friend who is a police officer and had the same thing happen to him, in his car, except his window was cracked a bit. They took his police equipment, a ps3 game, and even his shoes! He knows the kids that did it in his neighborhood too but he can't prove that they did it. I hope you find the perp, you actually have some dna to prove it.