Ok Izy, I will try to make sense of it somehow and answer but forgive me if I misunderstand.
'I am questioning whether it is indeed libelous/ immoral to 'mention' whether people have lied to 'cover up' accidental or unplanned circumstances surrounding a little girl's murder.'
Ok. Firstly I didn't 'mention' that this had taken place. I said that I could more easily imagine that lies had been told regarding the events that night than that the events had themselves been caused by a deliberate attempt to hurt a child.
This is what I termed 'putting a more positive angle' on some of the earlier suggestions of what may have taken place, mainly if not solely put forward by others.
I was trying to say that I didn't think the people in question had intended to harm their child. I added a disclaimer that stated I had no idea whether I was correct or not, but it was my feeling, and therefore worthless of course, to all intents and purposes.
'See I am not sure you can put a 'positive angle' on such a suggestion.' please see previous answer.
' Also why even suggest in the first place if you are not 'presuming' it to be true?' This is the bit that doesn't make sense to me. What is there to prevent someone suggesting something whilst not presuming it to be true? The two are not incompatible.
I hope the first part of this helps - if I have understood your meaning correctly.