It would surely be wrong to let them go scot-free just for lack of finger-prints.

由于缺少指纹而使他逍遥法外是肯定错误的。

youdao

"Zimbabwe has gone through processes of announcing national union and reconciliation in the past and these processes have all been geared towards providing impunity and allowing perpetrators to go scot-free,".

VOA: standard.2009.06.21

Big fish are allowed to go scot free, while only some minor players are reined in.

CNN: Business: Malaysia's Stock Market