When you are done with your direct testimony, the defendant can cross-examine you. You must answer his/her questions unless you object and the judge says that you do not have to answer. Questions should be relevant to the case.
If you have witnesses, you will put them on, one-by-one, and question them. You do not have to have other witnesses. The judge usually limits witnesses to people present at the most recent incident, but sometimes the judge will allow others. It is within the judge’s discretion which witnesses to allow. Since you are acting as your own attorney, you will need to be prepared to question the witness . Start by asking their name and how they know you and the defendant, then go into their specific testimony.
The defendant can cross-examine your witnesses. If you do not feel the question is appropriate or relevant, you may object. Then the judge will decide whether the witness must answer the question.