This research paper has examined the validity of the Forensic Assessment Interview Technique (FAINT). FAINT is a specific interview process - accepted and in current use - integrating the works of this researcher with the works of John Reid, Richard Arther, and Avinoam Sapir. The FAINT technique involves the evaluation of nonverbal behavior, projective analysis of unwitting verbal cues, and statement analysis. The fundamental hypothesis of FAINT is that truthful and deceptive criminal suspects differ demonstrably in their nonverbal, verbal and written communication, when asked to respond to a structured format of interview questions. FAINT maintains that these differences are observable and can be quantified to allow forensic interviewers to make accurate determinations of a suspect's involvement in a crime. This research has examined the validity of the technique as measured by a traditional, unweighted 3 point scale and a weighted scoring system (an issue being researched in this paper) comparatively used for determining truth or deception. This dissertation reports the results of both scoring systems, as well as a comparison between them and the historically used Behavioral Analysis Interview (BAI) that was developed by John E. Reid. / Criminology and Security Science / MA (Criminology)

In spite of the SAPS having a dedicated polygraph capacity since 1998, little research has been conducted with regard to the use of the polygraph in criminal investigations. Consequently, the aim of this research was to focus on the perceptions and experiences of investigators in the SAPS regarding the application of polygraph testing in criminal investigations, the application of the polygraph as an investigative aid, the extent to which it is used by SAPS investigators to resolve criminal cases opened by the general public and/or in internal departmental criminal investigations; and whether or not it has helped to solve cases by giving direction and/or focus to the investigator when an investigation is at an impasse. A qualitative research approach was conducted among investigators within the SAPS. The research design selected for this study was grounded theory. The sample consisted of twenty investigators, ten of whom had previously used polygraph examinations in their investigations and ten of whom had not. Data was collected from interviews, document analysis, field notes and memoranda which presented and detailed the perceptions and experiences of investigators in the SAPS regarding the application of polygraph tests in criminal investigations. / Criminology and Security Science / M.A. (Criminology)