Lawyer
From Wikipedia, a free encyclopedia written in simple English for easy reading.
A lawyer (or in some countries called an "advocate", "attorney", "barrister", "counsel", "counsellor", and/or "solicitor") is someone who studied law and got a degree in that discipline. If people have a problem with law, or with someone else, they might go to a lawyer to get legal advice. If the case goes to court, the lawyer will then represent those people, either as a prosecution lawyer, or as a defense lawyer. He or she might also help to prepare legal documents for those people, or give (legally binding witness) that some event took place (like the signing of a contract).
Of course there will be fees for the different services offered, unless the work is done for free, which is called pro bono.