Paulo Pinheiro does not provide any "evidence" either. Only his conclusion (aka opinion), which may or may not be politically motivated.

He is clear, no one neutral and affiliated with his UN Commission had any access. So he is relying entirely on the unchallenged testimony of partisan parties. He does not say, party A is telling the truth because of ABC and party B lied because it is contradicted by XYZ. That would constitute real "evidence".