I mentioned 'in all innocence' what turned out to be a very painful topic for her. [=I mentioned the topic without knowing that it was so painful for her to talk about it]
Your 'innocence' [=(more commonly) 'ignorance'] of the rules is no excuse for such behavior.
The defendant maintained/protested his 'innocence'. [=he said that he was not guilty]
(..) Sharon. Sharon, look at me. Look at me. Don't be afraid. It's okay, it's okay. Your mama's coming. Once again we are called upon to restore innocence. We burn this witch. We vanquish evil. No. You can't. You can't. - Don't let her say this! No! - We burn the child! (..)2006 Silent Hill
(..) What does she mean, Mommy? You're weak, my dear sister. You always were. Trust us, Dahlia. Have faith in our virtue. We will restore innocence. They had met many times since the town was built... ... and you were very good at following my clues. You may leave, Dahlia. (..)2006 Silent Hill