Prosecuting someone for trying to wipe his internet browser history to cover up a lie he made to the police is not any great stretch of the law. You can also be prosecuted for throwing out your garbage if you know there is evidence of a crime in there that you want to get rid of.
Of course you are free to wipe your email server to cover up anything if you are a democrat candidate for president.
Or/And, Lois Lerner.
What's the penalty for not knowing a preposition is something to never end a sentence with?