Detecting Deception Polygraph Testing: A Critique One of the most commonly used methods for detecting deception is the polygraph test. This is a procedure that combines skillful questioning techniques with physical measurements in order to determine stress levels that would indicate the presence of deception. It is widely used and is reliable enough to be used in a court of law, if it is properly handled and interpreted by an expert

Public policy makers in general and the police agency in particular should refrain from using the polygraph test in their selection of employees, particularly since, at worst, they may end up including potential robbers and murderers as part of their organization. The purpose of the followign study is to evalaute these conclusions by investigating the efficacy of polygraph tests in assessing police candidates Source Brett, a. Phillips, M., & Beary, J (1986)PREDICTIVE

(p. 214). In short, even if one is willing to overlook all of the glaring flaws with polygraphs and the ultimate impossibility of accurately measuring their accuracy, the best that can be said about them is that they detect deception better than random chance. Though it likely need not be said, "better than flipping a coin" seems a paltry justification for the still-widespread use of polygraphs in the criminal justice

Polygraph There has always been a search for a way in the social order regarding the degree of truthfulness or dishonesty in an individual. History reveals that there has been almost a universal constant endeavor to uncover the falsehood and know the truth. The Ancient Chinese, Arabs and Indians are known to have used methods from torture to duel fight for obtaining the truth and distinguish innocent and guilty (White Jr.,

Polygraph Reliability and Validity The validity and reliability of polygraph testing has been a subject of debate since such testing was first implemented almost a century ago (OTA, 1983, par. 1). Abundant research has been done on modern polygraph machines and techniques that has served to validate their use and their accuracy, however controversy still remains in the minds of many (Gougler et al., 2011, 196-201). One way to go about

The next step is evidence collection. Processing a crime scene without disturbing the evidences is a difficult task and investigators should take every precaution to gather evidence without affecting the crime scene. (GSA) Crime scene stepping pads' can be used for walking around the area without damaging potential evidences. Photographs and video must be taken before proceeding with the rough sketching around the crime scene. For this purpose 'crime scene