From human rights organizations like Human Rights Watch and Physicians for Human Rights and the tribunal's only investigators, they've collected testimony about these sites. And then with the second type of evidence, which is documentary evidence, these can be radio broadcasts, it's the proverbial paper trail. It can be intercepted between commanders. They've received quite a bit of information from NATO governments through intelligence. That is information that is important because it takes you up the chain of command eventually to Slobodan Milosevic.
Physical evidence is really the corpus delicti.
It is finding the bodies, the victims, exhuming and identifying the victim - and that's very important, and determining the cause of death. What you want as a prosecutor is really to have evidence from each of those three categories. That gives you your strongest case. Mr. Bowers, you are a prosecutor. Well, in this particular case you have to take into account the existing indictment.