![]() These samples are tested for ignitable liquid residues using two main methods, heated headspace and passive headspace. The samples are submitted for analysis in airtight containers, usually paint cans for solid debris, or in mason jars for liquid samples. ![]() During the commission of violent crimes, especially, there is a greater likelihood that fiber evidence will be left behind.įire Debris Analysis involves the determination of whether or not added ignitable liquid residues are present in samples obtained from fires. This type of transfer of fibers between victim, suspect, and scene is not uncommon. Scientists also provide crime scene examination and reconstruction and training to the law enforcement agencies within the State of New Jersey.Ĭlothing fibers can be easily transferred simply by physically brushing across another object, like a chair, or another type of fabric. The sub-disciplines within Trace Evidence Analysis can be divided into nine separate areas: The significance of trace evidence is often overlooked, however, in the absence of probative biological evidence, trace evidence may be the only source that can provide crucial investigative information.įor evidence submittal to the Trace Evidence Unit, see the Evidence Field Manual link on the OFS home page. Trace evidence may provide a link between the victim and a suspect, a victim and a scene, or the suspect and a scene. The handling and analysis of trace evidence requires care and specialized techniques. Trace Evidence Analysis is the discipline of forensic science that deals with the minute transfers of materials that cannot be seen with the unaided eye.
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