We will prove your case in court by the testimony of the witnesses and with physical evidence or documents.
You are your most important witness. A very simple case may not require other witnesses. A very difficult or complicated case may require many witnesses.
Sometimes expert witnesses are presented. A few examples of the use of expert witnesses include a certified public accountant to prove economic facts; a social worker, a teacher, a psychologist, or a psychiatrist to prove what is in a child's best interest; a medical doctor to prove the existence or effect of a physical injury; or a personnel counselor to prove a person's ability to produce income.
Witnesses may be subpoenaed and required to testify. A witness who is hostile or does not want to testify is a dangerous witness to call. Many willing witnesses prefer a subpoena to show an employer that they were in court or so that they can honestly claim that they “had no choice” and "had to testify."