At least Israel is democratic enough to hold a just trial and find the state responsible - within a conflict, incidents happen all the time. The question is whether they are brought to light or not. Do you think if a citizen of Gaza murdered an Israeli citizen, Hamas would hold a trial seeking justice? I think we both know the answer to that.
Peru forces rescue 54 adults and children held captive by Shining Path (AP)
from the article: Court holds state responsible for shooting of Palestinian girl