The tactical methods of overcoming the false testimony Abstract The objective of this thesis is to describe and analyse the false testimony at interrogation, its recognition and follow-up overcoming by means of tactical interrogation methods and other techniques. In the introductory part of the thesis, the elemental concepts such as the phenomenon of lie, interrogation and testimony are defined in order to gain some insight, without which it would not be well possible to dedicate to the research of detection of lie and its overcoming. The following part deals with the lie detection in crime investigation in particular, it highlights the importance of correct identification of false testimony and it pursues the lie from perspective of the recipient of lie, whose interest is to reveal the lie. The particularities in this area regarding children are outlined as well. The subsequent part is focused on the false testimony and its detection based on the verbal, nonverbal and paraverbal tokens in conduct of concerned person. I have attempted to capture the differences between intentional communicating of untruthful information, thus lying, and unintentional communicationg of untruthful information caused by natural process of forgetting. In the following part, the overview of tactical interrogation methods applied...

Denna uppsats belyser hur förhörsledare väljer förhörsmetod och hur det kan påverka rättssäkerheten. Syftet var att undersöka hur erfarenheten påverkar förhörsledarens val av förhörsmetod samt hur erfarenheten tas tillvara och sprids inom Polisverksamheten. Studien har genomförts i samarbete med Polisen i Malmö. I undersökningen har förhörsledare och individer med gedigen kunskap inom området intervjuats. Resultatet visar att erfarenheten kan påverka rättssäkerheten, dock har det inte undersökts i vilken utsträckning den gör det. Förhörsledare tillämpar inte en specifik förhörsmetod utan använder sig av den fria berättelsen som är ett inslag i både PEACE-modellen och den kognitiva intervjumetoden. Resultatet visa vidare att respondenterna i stor utsträckning vill att erfarenheter av förhörsmetoder ska spridas på ett bättre sätt. Respondenterna uttryckte även att mer vidareutbildning inom området är önskvärt då metoderna bör följa samhällsutvecklingen. / This thesis explores the way the interrogator chooses method of interrogation based upon experience and how this in turn will affect legal certainty. The purpose is to examine how the experiences within the police force will be taken advantage of and how it is disseminated within the organization. The study was conducted in cooperation with the Police in Malmö. By interviewing interrogators and persons with first-rate knowledge about the subject the researcher has tried to get as extensive research material as possible. The results show that experience can affect legal certainty, but the extent of this has not been further investigated. Interrogators do not use a specific interrogation method but uses the free story that is a feature in both the PEACE-model and the cognitive interview method. Furthermore, the experiences within the Police force in Malmö was examined and the results show that the respondents want this to be disseminated to a higher extent. The respondents also expressed that further education was most important and desirable as the methods develop to the same extent as society.