walk away scot-free

To escape from some predicament, accusation, or wrongdoing without incurring any penalty or punishment; to be acquitted of all charges for some crime or crimes. It sickens me that all these bankers who ruined our economy get to walk away scot-free, while millions of people have suffered as a result. Due to an error in the filing of evidence by police, the suspect ended up walking away scot-free.