When government takes you to court, and the judge asks who your legal representation is, IF you state that you have no representation because you are present, and MAINTAIN this position throughout the trial, the State must accuse you without representation as well. Since the State can't get on the stand and accuse you, there is no accuser. If representation had been allowed, all kinds of people could get on the stand representing the State. Without representation, there is no accuser who can get on the stand and speak his case into the record. The attorney/prosecutor can't do it except if he is witness to the actual "crime." Case law for this - even though it is seldom used - is Trinsey v. Pagliaro - https://duckduckgo.com/?q=Trinsey+v.+Pagliaro&ia=web.