What part of 5 year old living in a forest all by himself for God knows how long are you people not getting?
He probably didn't even know what a crime was when he was accused and just went with the flow because yet again, he knew nothing about human society and how things actually worked. Not to mention the Knight Order guy lied about the crimes but how would he know that the guy who is supposed to be reputable was actually a corrupt liar at the time.