The goal of character reference letters is to tell the judge a story. To give the judge insight into a defendant as a person.Include specific examples of how the person has helped you or someone else, or how he or she has been a leader or an inspiration. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. There's not time to read all that comes before a judge to read. 2. How To Start Your Letter. I am writing this letter on behalf of a former student of mine who is presently before you on criminal charges and is due to be sentenced shortly. Use specific examples of when you observed the defendant's good character. Describe a time you saw the defendant go out of his way to help someone in need. Character Letters are a great tool to help convince a judge to give a reduced sentence in a criminal case.