It is possible that he got out from one of the upstairs windows - I guess it just has to be possible for him to do so. He admitted he could get in - he could have used a ladder to get out. If he couldn't get in, then he couldn't get out - but if he could get in, it's highly possible that he knew how to get out. If you know what I mean?

I know that is why there was the judgement - however the family were saying he got out of a specific window because all the downstairs windows and doors were secure - so to me one the defence should have checked could Jeremy physically get out of that window and lock it from the outside - because that was the argument used in court.
what I am saying is that it was relevant that all the windows were locked if you are going to accuse him of getting out and leaving the house secure as confirmed by the police. Even if they had proved the window could be locked from the outside it did not mean he did that on the night , but for the police not to confirm that fact seems pretty ludicrous to me .
He also said other family members used to get in and out of the house late at night he was not the only one . So I don't think he ever needed to use a ladder.