In 30 seconds of research on the web I found the following regarding the Burg case.
1. He was not prosecuted because the acts committed were past the statute of limitations. Making prosecution unlawful. Not a choice by the Prosecuting attorney.
2. He was indicted in Federal Court on two counts of obstructing justice. So he was criminally charged-I don't know what the outcome was.
It's too bad if he did was is said of him he should be sitting in a jail cell somewhere for all the crimes.