Having read some articles on the net about the Bosnian War, it seems to me (or I could have read incorrectly) that some of the evidence in the trials were misused/fabricated? So is there any actual credible evidence of genocide happening?
Discovery and excavation of mass graves in the region has been going on for years.
The Srebrenica is a relatively well documented event. I really wish someone with extant expertise in the disintegration of Yugoslavia would pick up your question.
In the meantime, although not my favorite source, the Wikipedia entry is surprisingly detailed and informative, and might offer a good starting point on the topic.
Anther document you might find useful is:
And the Addendum
However, the actual admission of genocide is a highly sensitive political issue and there are a horde of denialists.