It is 'scot-free' apparently, and interestingly has nothing to do with the Scottish, it seems:
> Etymology
From Middle English scotfre, from Old English scotfrēo (“scot-free; exempt from royal tax or imposts”), equivalent to scot (“payment; contribution; fine”) + -free.[1]
It is 'scot-free' apparently, and interestingly has nothing to do with the Scottish, it seems:
> Etymology From Middle English scotfre, from Old English scotfrēo (“scot-free; exempt from royal tax or imposts”), equivalent to scot (“payment; contribution; fine”) + -free.[1]
https://en.wiktionary.org/wiki/scot-free