Weak efforts to do so start with investigators finding bodies and then the Croats throwing fits causing them to stop. They do not push Croatia at all - never any sanctions for them or even serious threats of them.
On the other hand, incredible worldwide attention and untold millions have been spent to "prove" Srebrenica. The US and other countries are making a case against Serbs over Srebrenica, but not really doing anything against the Croats. Nor is Croatia occupied so Serb civilians can return to their homes. The whole thing is double standards. The countries making their much-hyped case have the burden of proof on them. If Croats were on trial for Krajina, and thousands of investigators and UN/NATO soldiers were spending YEARS and MILLIONS trying to make a case against Croats - yeah, I'd expect them to come up with A LOT of concrete evidence and documentation. The records, when millions are spent by the international community on much hyped case, should be available to the public. Why not? The truth is the truth and it should stand scrutinization.