Well that really depends on the prosecutor and the judge but I can probably say with pretty much certainty that if you had an attorney to be there next to you and to make the appropriate motion to the court to have them dismiss the charges against you based upon the confession and insufficient evidence against you, that it would go a lot faster. And that there will be less likelihood that things could get somehow twisted here you are charged with something else instead.  It is always best to have someone "block" for you, so to speak.  Think about it.  It may be money well spent for yourself.  Good luck.