Answer:
Investigators acting as police witnesses in a case should be prepared to encounter a certain amount of theatrics during the trial. They should cultivate a courtroom demeanor.
Explanation:
Courtroom demeanor refers to one's professionalism within a court of law. Your courtroom demeanor is an extremely crucial factor to how exactly your witness testimony is perceived by the jury or bench.
Since this is an appellate court, all cases have already been heard, so it cannot be a court of first instance