Principle underlying crime scene investigation. Collect and package trace evidence. Cyber Crime is replacing drug trafficking. During his first years of work, the only instruments available to Locard were a microscope and a rudimentary spectrometer. Locard formulated the basic principle of forensic science, "Every touch leaves a trace". Explain the basic principles behind light microscopy. First recognized by Doctor Edmond Locard, this Principle has been used by crime scene investigators for almost a century now. List common types of trace evidence . Identify the types of microscopes used in the examination of trace evidence. The principle of locator exchange (LEP) Dr. Edmond Locard (1877-1966), known to all as the French "Sherlock Holmes", was a pioneer in forensic evidence investigations. So do criminals, because the transferring of any type of trace evidence, of which pet hair counts, is a major part of Locard's Principle of Exchange. Edmond Lockard (1877-1966) in 1910 persuaded the police department in Lyons, France, to give him two attic rooms and two assistants to start the world’s first police laboratory. Professor Edmond Locard's famous theory of exchange can be summed up as as "every criminal leaves a trace".Locard said, in his 1934 publication "La police et les methodes sceientifiques":"Any action of an individual, and obviously, the violent actions of a crime, cannot occur without leaving a trace." Trace evidence is based on Locard’s Exchange Principle. Objectives: By the end of this activity, you will be able to: 1. Edmond Locard (1877-1966) in 1910 persuaded the police department in Lyons, France, to give him two attic rooms and two assistants to start the world's first police laboratory. Locard opened the world’s first police scientific laboratory in 1910 in Lyon, France, where evidence from crime scenes was scientifically examined in a few small attic rooms. … Factors affecting transfer. Locard's Principle of Exchange. Locard’s exchange principle rigor mortis saf16558_ch01.qxd 5/15/06 8:19 AM Page 3 ISBN: 0-558-13856-X ... as the crime laboratory, where the principles and techniques of the physi-cal and natural sciences are practiced and applied to the analysis of crime-scene evidence. Development of Locard’s Exchange Principle Before the 19th century, most of the time in court and during investigation, witness testimonies were favored as opposed to evidence. The presence of seminal stains confirms that sexual activity took place. Demonstrate how transfer of evidence occurs. ACTIVITY 2-1 LOCARD’S PRINCIPLE Introduction: Locard’s exchange principle states that trace evidence can be exchanged between a crime scene, victim, and suspect, leaving trace evidence on all three. Locard’s Exchange Principle in Action Lab. whenever two things come in contact -- whether it be person-person, person-object, person-place, object-object, or object-place -- some amount of information is exchanged. Locard’s Exchange Principle is named after Edmond Locard, known as the ‘Sherlock Holmes of France’ he was one of the founding fathers of forensic science. Explain Locard’s exchange principle as it pertains to trace evidence. ... 5. activity of or around the evidence location. Most investigators refused to perform invasive procedures on the dead body due to emotional respect, squeamishness and sometimes even superstitions. 2. About the Author. Locard's Theory - the Principle of Exchange. Recent government findings indicate that cyber crime has pushed aside the illicit drug trade as one of the top Observing Locard’s Exchange Principle Name:_____ Period #:_____ Introduction. 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