When my uncle was young, he was arrested for trespassing on government property because he was found walking on railroad tracks. My uncle was facing federal charges, but didn’t think it would be too difficult to navigate the system by himself. He nearly lost his case because he started out without a lawyer and without any kind of experience in the legal system.
Many people facing criminal charges feel that they can avoid spending too much money by defending themselves. Even in the least complicated cases, it is important that you have professionals on your side. Attempting to defend yourself or trying your own hand at brief writing could mean that you end up with a conviction that would otherwise have gone away.