There was the Muslim girl who birthed a child by a black Frenchman, but who had claimed before the child was born that the baby was fathered by Serbs. This eyewitness was lieing and western press spread and featured that lie. Too bad for their collusive effort, perhaps, that the child had too much melanin. Maybe then they could have carried on their lies and deceptions and people like you would have called lies "proof".
Much sympathy for Muslims was garned - and condemnation of the Serbs - by film of an emaciated man said to be a Muslim in a Serb concentration camp. Yet, it was a Serb man, suffering from TB, being kept by Muslims in a camp. Proper amends and proportional efforts at coming clean on this were never made by the west. So, even today the west is guilty of years of deception on this "proof".
There were the British journalists who themselves filmed behind wire fencing in yet another phony "proof" of a Serb concentration camp. Again a lie, a deception.
There was the featured story of Rajmonda, an 18-year-old Albanian who joined the KLA, who claimed that her sister was killed by Serbs. Yet the Canadian journalist finally decided to check up on the story and found the sister alive, unscathed. I guess you would call Rajmonda an "eyewitness" and the story, before facts were ascertained, as "proof".
Even your Slovenia has figured in in deceptive "proof" photograhpy:
"Time magazine provided similar coverage. The firing soldier in its cover photo of 'Serb murders wounded man' in Brcko wears a uniform unlike any worn by Bosnian or Serb forces; the architecture is foreign to Brcko; and a sign (Donn Zela) identifies the location as Slovenian. In fact, the picture was taken by a Reuters photographer in early May 1992! (Time, 17 May 1993)"