Matt Levine recently summarised this argument is his usual folksy style:

https://www.bloomberg.com/opinion/articles/2019-12-02/the-bl...

That's certainly how the OP got to HN. What Levine seems to be overlooking is that what Boies was attempting was obstruction of justice / abetting after the fact by helping hide evidence of a crime, which is a violation against the State, separately from any civil representation of victims.