1
general::
Phrase(s): go scot-free [and] get off scot-free
to go unpunished; to be acquitted of a crime. (This scot is an old word meaning "tax" or "tax burden.") • The thief went scot-free. • Jane cheated on the test and got caught, but she got off scotfree.
McGrawhill's American Idioms And Phrasal Verbs