Verb
walk free (third-person singular simple present walks free, present participle walking free, simple past and past participle walked free)
(transitive, idiomatic) To go unpunished; to win, or avoid, a criminal court case, particularly when actually guilty.
What do you suppose will satisfy the soul except to walk free and own no superior? Walt Whitman
Freedom - to walk free and own no superior. Walt Whitman
I come from the liberal side of thinking: Better one guilty man should walk free than one innocent man found guilty. Ian McShane