I see there are so many posts on this topic. I admit I did not read all of them in their entirety. So I don’t know if this was mentioned.
I don’t think we will ever know the TRUE story of what happened. Levi Aron could tell whatever story he wants but only Leiby knows what REALLY happened! But unfortunately he is not here to refute Aron’s stories. That is a very sad and tragic part of this case.
Other than Leiby, Hashem is the only one who knows the truth. He will make sure Levi Aron is judged appropriately whether here or in the olam haemes.
Our hearts go out to the Kletzky family.