It is generally accepted that an attorney who is representing a client at a judicial trial is not permitted to also be a witness at the same trial. This prohibition on an attorney acting as both an advocate and a witness at a trial appears in every state's rules of professional conduct.
A competent witness is one who has the sufficient mental capacity to perceive, remember, and narrate the incident he or she has observed. A competent witness must also be able to understand and appreciate the nature and obligation of an oath.
After you testify in court, you are not allowed to tell other witnesses what was said during the testimony until after the case is over. Please do not ask other witnesses about their testimony, and do not volunteer information about your own testimony. Know to whom you are talking when you discuss the case.
If you've witnessed a crime, you might get a witness summons telling you to go to court. This means you'll have to be at the court on the day of the trial and give evidence if you're asked to. You should go to court if you get a summons - you can be arrested and taken to the court by the police if you don't.
Eyewitness testimony can be unreliable due to conditions at the scene of a crime, memory “contamination” and misrepresentation during trial.
Key Concepts. All witnesses are presumed to be competent, unless they are shown to be otherwise. A witness is not competent if he or she is unable to express him- or herself in a manner than can be understood, or is incapable of understanding the duty to tell the truth.
Hostile & Untrustworthy – These types of witnesses purposely lie in an attempt to disrupt the investigation. If it has been determined that this person is lying, the next step should be to find out why.
First of all, liars have difficulty maintaining eye contact with the person asking the questions. If the witness looks up at the ceiling while thinking of an answer, or looks down at the floor, they are liying every time. When a witness covers his mouth with his hand, he is about to lie.
Don't nod, shake your head or make faces or noises no matter what someone says. The judge and both lawyers can look at anything you take to the witness stand. Don't take anything you don't want them to see or read. Don't try to trick the judge and lawyers.
For men, a dark-colored suit, tie, crisp dress shirt, and pair of oxfords work best. Women can wear either skirt suits or pants suits, with a blouse, and closed-toe shoes. All clothing should fit appropriately and conservatively, neither ill-fitting or too loose.
What will happen when you give evidence. When you go into the courtroom, you'll be 'sworn in' - this means you agree to tell the truth. It's a criminal offence if you don't tell the truth. You don't have to remember what to say when you're sworn in - you'll be given a card with the words on it.
If you fail to attend the court after a witness summons has been issued, a warrant for your arrest would then be granted. Also, making an excuse that you are ill for example is not good enough. You would have to produce a doctor's medical certificate that states that you are not in a fit state to attend the court.