Mukesh Sharma

The field of forensic psychology has been growing in prominence in the past couple of decades. Psychology is used to detect the deception of the persons are involved in many areas that relate to crime, both solving crime and absolving people wrongly accused of committing crimes. The goal of lie detection is the discovery of a truth that is known to one person and concealed from others. Psychophysiological lie detection, or polygraphy, is based on the theory that lying produces particular emotions, which produce corresponding measurable physiological responses. Modern polygraphy measures blood pressure, breathing, and skin conductance. Alternative metrics such as voice stress analysis and functional magnetic resonance imaging are as yet unproven. The control question test uses relevant, control, and irrelevant questions. A larger response to the relevant questions is considered evidence of deception. The guilty knowledge test uses concealed information questions and irrelevant questions. Through this article, authors have tried to report that how the polygraph examination of real cases is important and helpful to the investigating officer, using our three case study, results are demonstrated.   Keywords: Polygraph test, Psychology.

In all types of heinous crime cases like murder, homicides, assassinations, police encounter with criminal firearms are mostly involved which make important trace evidence as Gunshot residue (GSR), helps the investigating agency and forensic expert to solve and get a proper direction of investigations. Though this review article we tried to cover the how GSR form, composition and recent advancement in detection of GSR. This pilot study will provide a hand on single article to the reader with great interest of GSR and its value in forensic investigations. The review results are in the form of impact of GSR in crime solving possibility and very interesting case study also report.   Keywords: Gun shot residue, Crime scene, EDX