Leach v Chief Constable of Gloucester [1999] 1 All ER 215 also considered policy issues. Here the plaintiff had been a lay witness to a police interview; a requirement under the Police and Criminal Evidence Act 1984. She had sat in on several interviews with Frederick West (a suspect accused of a series of murders). As a result of this she had suffered Post-traumatic Stress Syndrome. In her claim, she stated that the police had owed her a duty of care to inform her of the disturbing nature of the case. The Court of Appeal dismissed her claim. The sort of person who could act as a lay witness was very wide and it would impose too onerous a burden on the police force to psychologically test every person who could potentially hold such a position.