I personally dont think Bin Laden had anything at all to do with 9/11 so here i disagree with you. However i do absolutley agree that for this exact reason, where there is a doubt, then its up to a jury to decide on the evidence and not for a state to decide somone is guilty simply because they say so. Thats exactly what thos "dictators" the us remove do in their countries that the us is busy spreading democracy to!
U.S.-led coalition conduct 23 air strikes against ISIS in Iraq and Syria (Reuters)
from the article: 'Goldstone Report failed to address difficulties of asymmetric warfare'