Identifying Trace Evidence Forensic Chemistry and Trace Evidence Analysis CJ 385 Professor Luckas July 15‚ 2012 Question 1 In order to identify that a white powder might contain cocaine‚ a forensic drug chemist can conduct a number of tests. The tests in order to identify cocaine are conducted based on the physical and chemical properties of cocaine. The physical and chemical properties of a substance make it unique‚ thus identifiable and distinguishable from other physical evidences obtained
Premium Forensic science Sherlock Holmes Trace evidence
Trace Evidence Trace evidence is an important part of a team in solving crimes in forensic investigations. According to Edmond Locard‚ there is specific that no matter wherever people interact with their environment or is physically involved in a crime often leaves something at or something away from the scene. Those in this category of evidence include many diverse types of macroscopic or microscopic materials that certain examples are easily visible to our “naked eye”. The subject is broad and
Premium Forensic science Spectroscopy Forensic evidence
Trace or transfer evidence can be any small‚ and to the untrained be a seemingly insignificant piece of material‚ whether man-made or natural‚ that has been left at a crime scene. Edmond Locard‚ founder of the Institute of Criminalistics at the University of Lyon‚ France‚ developed what has become known as Locard’s Exchange Principle. This states that every contact leaves a trace (Trace Evidence). Trace evidence can consist of just about anything. Some types of trace evidence include but are not
Premium Fingerprint Forensic science Forensic evidence
many clues left behind. The obvious would be a the body or bodies‚ clothing‚ and sometimes even the murder weapon. While these are great way to solve a case there’s another kind of evidence; trace evidence. Trace evidence are small pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them include metal filings‚ plastic fragments‚ gunshot residue‚ glass fragments‚ feathers‚ food stains‚ building materials‚ lubricants‚ fingernail scrapings‚ pollens and
Premium Bloodstain pattern analysis Forensic evidence Forensic photography
http://projects.nfstc.org/trace/2009/index.htm Website is run by the National Forensic Science Technology Center. This website gives a brief description of what trace evidence is. It states “ Trace evidence is considered one of the most diverse of the forensic disciplines because it can include the analysis of paint‚ glass‚ hair‚ fibers‚ particulate matter‚ botanicals‚ explosives‚ and impression evidence‚ among others.” It goes on to state how the understanding of trace evidence can be crucial to
Premium Forensic evidence Evidence law Forensic photography
Trace evidence is based on Locard’s exchange principle which contends that every contact no matter how slight will leave a trace . The trace is normally caused by objects or substances contacting one another‚ and leaving a small sample on the contact surfaces. Foreign objects or pieces of material present at a crime scene and tracing its origin can assist in an arrest and conviction the same way finding some trace from the victim or crime scene on a suspect can have a strong impact on a case. Trace
Premium Forensic evidence Evidence law Evidence
place” (Lynch & Duval‚ 2011). This theory better known as "Locard’s Exchange Principle” is the foundation of the forensic study of trace evidence as we know it today. Trace evidence is very important in forensic investigations as this evidence includes different types of microscopic materials as well as some materials that are easily visible to the naked eye. Trace evidence examination is the analysis of small particles in order to assist in establishing a link between a suspect and the victim of a crime
Premium Forensic evidence Crime Forensic science
Upon the arrival of the law enforcement to the crime scene‚ it is essential that measures are taken to protect the crime scene‚ and subsequently to protect any potential evidence‚ in the manner that it was left at the scene. Crime scene protection not only includes cordoning off the area where the crime is believed to have occurred but also includes documentation of all of those present at the scene including law enforcement personnel as well as noting anything that may look out of place. This allows
Premium Evidence law Forensic evidence Blood alcohol content
of this job is looking for evidence. There are different types of evidence. Some can be seen with an unaided eye and some can’t. Trace evidence cannot be seen with an unaided eye. Every person who is physically involved with a crime leaves some kind of trace evidence such as hair‚ fibers‚ and even have gunshot residue left on the perpetrators hands. It is even possible to obtain a confession from the suspect . In the OJ Simpson case‚ there was a lot of trace evidence. Some of it led to suspicion
Premium Forensic evidence Police Crime
TRACE EVIDENCE AS AN IMPORTANT TOOL UNDER FORENSIC SCIENCE Introduction Edmond Locard‚ founder of the Institute of Criminalistics at the University of Lyon‚ France‚ developed what has become known as Locard’s Exchange Principle. This states that “every contact leaves a trace”‚ implying that a criminal will leave trace and take away trace evidence when at a crime scene. Trace evidence often refers to minute samples of a substance‚ particularly fibres‚ hairs‚ glass fragments and paint chips. Crime
Premium Hair Refractive index Glass