http://www.icty.org/x/cases/gotovina/trans/en/080408ED.htm
There is a tape introduced with the witness 6 of the prosecution that shows 'Knin bombarded all over'. The defensor asked for the original copy of the prosecution where, instead of the sirens and bombarding you can hear birds singing. And later he has shown that instead of the town bombarded in many places, the serbian colonel that provided the proof recorded the image putting himself in the center of the smoke of the Tvik factory (which was producing weapons) recording towards outside so it appeared that everything around is covered with smoke.
There were various proofs of this kind during the trial, the school that was hit because it was closed with army troops inside, one projectile beside the hospital, beside which lied the weapon the serbian side was shooting from. I believe all of these things can be found in different transcripts from the trial. So, if the prosecution does not find strong evidence in photographic material that would show that the civil points were deliberately aimed, the written affirmation from Gotovina's soldiers that they did it, would be a nice solution for the prosecutor. Besides, why would someone prefer artillery diaries to photographic evidence that is taken a lot during the war?
There are these kind of proofs that particular houses were being destroyed, not by artillery but by perticulars (war vultures going around those houses committing robbery, burning the houses or killing) but they can not prove that Gotovina had the control of them.