My son has autism and mild retardation. He does lie but it's something like a little kid would do. For example, I found his dirty socks behind the toilet today. I don't wear sock and he was the only one using that bathroom. He tried to say it was not him but it was and I confronted him about it.

Just because you have autism or something like it you still accountable for your actions. Having an illness does not give you a free pass