![]() A report is issued naming any controlled substances identified. Microscopy is also available for examining case Instrumental techniques such as ultraviolet (UV) spectroscopy and gas chromatography (GC).Ĭonfirmation of substances tentatively identified is achieved via infrared spectroscopy (IR) or mass spectrometry (MS). Options are available for preliminary testing, including traditional wet chemistry methods such as spot tests, thin layer chromatography (TLC) and extraction, as well as During analysis, a case is inventoried with careful notes being made at this and each step of the analysis. The amount of substance is determined using a balance. These are analyzed by the Toxicology section. Tablets, capsules, powders, paraphernalia and residues, but does not include biological specimens. Repeat offenders, assisting with serial crime investigations, and resolving missing and unidentified person cases.ĭrug Chemistry is responsible for the analysis of exhibits suspected of containing controlled substances (drugs) and Cannabis (marijuana). These searches have also proven to be invaluable in identifying ![]() During a search, the DNA profilesĭeveloped from forensic samples are compared against the offender DNA profiles to identify possible matches. Potential suspects for unsolved crimes can now be identified using computer searches against this database. Then, the law has been expanded to include persons convicted of all felony offenses and persons arrested for certain other qualifying offenses.ĭNA analysis is performed on these samples and the resulting DNA profiles are submitted to the Federal Bureau of Investigation’s Combined DNA Index System (CODIS), aĭatabase software program. This law was originally enacted in 1989 and required persons convicted of a sexual offense to submit samples for DNA analysis. The DNA Indexing Laboratory was established as a branch of the Springfield Forensic Science Laboratory to analyze samples collected from individuals that are eligible under These same markers are used throughout the nation so that a computer based search system Several lociĪre examined, offering a very high potential for differentiating between individuals. The DNA markers tested for are included in a class of markers called STR's (Short Tandem Repeats). To produce sufficient material to test, and then analyzed. The questioned DNA is extracted out of a stain, amplified The DNA technology currently in use is based on the amplification process called PCR (Polymerase Chain Reaction). This type of analysis establishes whether or not a particular individual could be a donor of the biological stain(s) found at the crime scene. The forensic biologist can compare DNA genetic markers in crime scene samples to the DNA markers identified in standards from individuals believed to be involved in theĬase. The day-to-day work of a forensic scientist in an ISP crime laboratory, whileĮvidence item and case circumstances vary, include aspects of all of the above activity.įorensic biologists utilize chemical, enzymatic, and microscopical techniques to identify biological samples (e.g., blood, semen, saliva) associated with criminal cases. ![]() In addition, forensic scientists regularly train lawĮnforcement personnel in the proper recognition, collection and preservation of evidence. Rather, daily, the ISP's forensic scientists: 1) think across disciplines, i.e., "What could chemistryĪnd biology and physics and anatomy tell me about this evidence in this crime scene?" 2) make clear bench notes about work, as these may be introduced as evidence in court,Īnd 3) communicate well with one another so they will be able to testify clearly and withstand challenge in court. Most ISP forensic science work involves laboratory/bench work analysis.įorensic scientists in the ISP respond to crime scenes infrequently. The specialty areas are as follows:ĭaily crime laboratory work takes place to establish the scientific truth about evidence for court. The laboratories in ISP's system, accredited by the ISO/IEC, are located in Belleville,Ĭhicago, Joliet, Morton, Rockford, and Springfield. Services to all of the approximately 1,000 law enforcement agencies in Illinois. Six forensic laboratories provide forensic The Illinois State Police Division of Forensic Services oversees the third largest system of crime laboratories in the world.
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