Swiss senator Dick Marty, rapporteur for the Council of Europe, called the disposal of evidence from the Albanian town of Rripe highly irregular, the Serbian broadcaster B92 reported.
Based on Marty's report, the Parliamentary Assembly of the Council of Europe Tuesday called on the international community and Serbian, Albanian and Kosovo authorities to ensure justice for human organ trafficking and other war crimes.
Marty said action was long overdue.
"That certainly is not normal procedure in any tribunal in the world. When you collect evidence and believe you do not have the necessary evidence, or do not have the necessary jurisdiction to continue with your investigation, you never destroy the evidence, especially when there is no statute of limitations," he told the Belgrade daily Blic.
He said he was not accusing the war crimes court of conspiracy, however.
The Council of Europe issued a report in December accusing the Kosovo Liberation Army leadership, which now rules the territory, of kidnapping and murdering Serb civilians and selling their organs.