Information that authorities are going to be trying to figure out. one of the other things that the federal authorities are involved in is trying to trace the handgun, the semiautomatic handgun recovered from the scene. there is a great deal of resources there, because the atf and the fbi can help use their crime labs, they can do a lot of stuff to figure out where he got this gun, perhaps when he obtained it, whether it was his or someone else's. and if there was anything -- anyone who might have known this was going to happen. the atf, for example, has a ballistics system that can trace perh...