Psychology plays a main role in the criminal procedure. The psychological methods started being used only in the 19th century. During the legal proceedings the autorities must deal with people. The behavior of the people is very different. The authorities must know the basic rules of the psichology to understand the accused people and witneses. The human memory has a lot of regularity. The knowledge of these regularities make easier the efforts of the authorities to get the truts. The importance of the pschichological knowledge in the legal occupation is unquestional. Overbearing police methods creat too high risk of false confession and are not likely to yield factually reliable information from the accused. A significant number of confessions that result in wrongful convictions are obtained through coercive questioning. This paper examines false confessions and discusses the psychological and social factors that influence the verdict in criminal procedure and how often do false confessions lead to miscarriages of justice. In determining the admissibility of confession evidence, the courts have to considere factors such as mental abuse in addition to physical force and threats.