Forensic Analyses Articles

  • New and updated forensic crime lab grant funding opportunities

    In case you missed it, the NIJ is hosting a webinar tomorrow (1:30pm EST) on grant funding opportunities for publicly funded crime laboratories. The topics include 2017 changes to traditional grant programs, like Coverdell, DNA CEBR, and research and Evaluation for the Testing and ...


    By Qualtrax Inc

  • Case study - NAPL forensics analysis at tank farm in Boston

    Ambient Engineering, Inc. (Concord, MA) used Sitelab to investigate and remediate a former tank farm along Boston Harbor contaminated by a large, subsurface plume of commingled diesel fuel and No. 6 fuel oil. Loading racks (above) are suspected to have contributed to most of the site’s contamination. Light Non Aqueous Phase Liquids (LNAPL) collected from 40 monitoring wells were tested ...


    By Sitelab Corporation

  • Case study - Oklahoma crude oil forensic analysis

    An oil company used Sitelab’s laboratory to perform oil forensic analysis testing crude oils from different well sites to determine the percentage of oil content from two formations. The wells tap into these zones at different depths, thousands of feet below the ground. Knowing what type of oil being pumped is important. All six oil samples had similar GRO content, but the PAH content in ...


    By Sitelab Corporation

  • Case study - NAPL forensics analysis at refinery site in Kansas

    An environmental consultant at Subsurface Environmental Solutions, LLC used Sitelab to fingerprint a large plume of Non Aqueous Phase Liquids (NAPL) located at a former oil refinery in Kansas. The plume is commingled with gasoline, diesel, crude oil and other petroleum products. Sitelab’s portable UVF-3100D analyzer is fitted with optical filters which can measure the C6 to C10 gasoline ...


    By Sitelab Corporation

  • The (Environmental) Science of Investigation: Interactive Forensics Training Helps Professionals Solve Petroleum Contamination Cases

    When a site is contaminated with petroleum products, there are many questions. How did it happen? When did it happen? And, most importantly, who is responsible for paying to clean it up? This fall, Rutgers University’s Office of Continuing Professional Education (OCPE) will ...

  • Forensic evaluation of multiple cracking of a concrete test cell built over an open graded aggregate base

    In August 2011 a test cell of 6 inch thick concrete surfacing placed over of special open graded Limestone aggregate base predominantly 8 inches (203 mm) thick was constructed at the MnROAD research facility. The two layers overlaid an existing 6 inch (150 mm) of MnDOT non–drainable aggregate base that overlaid a clay/silt sub–grade. In July 2012, an extensive cracking pattern was observed. This ...


    By Inderscience Publishers

  • A rational approach for conducting highway pavement forensic investigations

    Forensic investigations of highway pavements are generally conducted to investigate premature failures, but there are other reasons for conducting them, such as understanding exceptional pavement performance. Although frequently conducted, research was needed to identify and evaluate current investigation practices, and to develop a rational process that considers relevant factors and provides a ...


    By Inderscience Publishers

  • Forensic engineering applied to the analysis of a gas explosion in a residential building

    Present paper deals with the identification of the cause of an explosion in a hollow space positioned below a residential building as the result of welding operations. On field investigation clearly demonstrated that the explosion was due to the ignition of a flammable atmosphere in the basement of the building. Along the trial two hypotheses were brought to the judge: (a) explosion of an ...


    By Inderscience Publishers

  • Identification of forensic fabrics using a portable Raman spectrometer

    At a crime scene, a police officer collects a fiber sample that may prove to be invaluable evidence in identifying a criminal or exonerating an innocent person. While FTIR has been used for analysis in the past, the strong absorption of the fabric or the glass slide where it is mounted makes the spectrum very hard to interpret. In recent years, Raman spectroscopy has been studied extensively for ...


    By B&W Tek

  • In response to O'Reilly et al. (2014)

    Coal‐tar‐based pavement sealant, a black liquid that is sprayed or painted on asphalt pavement, typically is 15 to 35% by weight coal tar or low‐ or high‐temperature coal‐tar pitch. USGS, other governmental, and academic research that has concluded that coal‐tar‐based pavement sealants are a major source of urban PAHs have relied on a wide array of forensic methods. Published academic and ...


    By John Wiley & Sons, Ltd.

  • Development of advanced Raman spectroscopy methods and databases for the evaluation of trace evidence and the examination of questioned documents - Phase II

    Abstract: Researchers from the City University of New York, West Virginia University, the New York Police Department Crime Lab, and The Metropolitan Museum of Art have formed a multidisciplinary collaboration to further the application of Raman spectroscopy and non-destructive surface-enhanced Raman scattering (SERS) analysis techniques as applied to the evaluation of trace evidence ...


    By AcuTech Scientific Inc.

  • The use of portable and handheld Raman spectroscopy for forensic investigations

    The Raman technique is gaining widespread acceptance as an investigative tool for forensic applications. This article focuses on the use of portable and handheld Raman spectroscopy in the field of forensic science and illustrates it with real-world examples. The benefits of Raman spectroscopy are well recognized for the molecular identification of unknown molecular compounds and as a result the ...


    By B&W Tek

  • Precellys application focus forensic - case study

    Forensic laboratories working with hard samples such as hair [1, 2J, bone [3], teeth, skin, etc. experience difficulties with DNA extraction due to the high energy needed to grind these tissues. Moreover, biological evidence is available in small quantities and the current techniques used do not provide high quality results. The Precellys homogenizers provides high speed sample disruption based ...


    By Bertin Technologies

  • Response to O'Reilly et al. (2014)

    Recently, O'Reilly et al. (2014) provided a review of environmental forensic techniques for source characterization and identification of pyrogenic polycyclic aromatic hydrocarbons (PAHs) in sediments. They also provided an example case study pertaining to refined tar‐based sealers [commonly known as coal tar‐based sealants (CT‐sealants)] to support their contention that CT‐sealants are not a ...


    By John Wiley & Sons, Ltd.

  • Minnesota I35W steel bridge collapse: lessons learned and challenges revealed

    This article discusses an independent investigation and associated forensic analysis of the old Minneapolis highway I35W Bridge that collapsed on 1 August 2007, which is based on a thorough examination of the original design drawings, a series of detailed 2D/3D finite elements computations of the bridge and the material evidences disclosed by National Safety Transportation Safety Board (NTSB) ...


    By Inderscience Publishers

  • Reconstruction of a go–karting fatality

    Concession go–karts are recreational hire–vehicles with a unique and challenging set of crashworthiness requirements. A case study reconstruction of a fatal crash involving a female rider, that occurred at a speed of 25 km/h on an 'in–door' circuit, has revealed a number of crashworthiness issues that need to be considered by both designers and operators. Details of the forensic investigation of ...


    By Inderscience Publishers

  • Parsing pyrogenic PAHs: Forensic chemistry, receptor models, and source control policy

    A realistic understanding of contaminant sources is required to set appropriate control policy. Forensic chemical methods can be powerful tools in source characterization and identification, but they require a multiple‐lines‐of‐evidence approach. Atmospheric receptor models, such as EPA's Chemical Mass Balance (CMB), are increasingly being used to evaluate sources of pyrogenic polycyclic ...


    By John Wiley & Sons, Ltd.

  • Forensic engineering for machine foundations

    Machine foundations are dynamically loaded structures whose response depends on a number of parameters such as strength, stiffness, mass, damping, soil–structure interaction and fatigue. Performance–based designs and evaluation procedures are gaining popularity particularly with respect to structures that have been built using codal provisions existing a few decades back. Enhancement of knowledge ...


    By Inderscience Publishers

  • Forensic engineering of fire damaged concrete structures: state of the art

    All structures are likely to be subjected to elevated temperatures during an event of fire. Due to accidental thermal loads the structures may be subjected to cracking and that affect both the mechanical or structural properties. Even though total collapse of structure is rare, the structures or a part of it may suffer partial damage. Thus structures need to be thoroughly assessed in order to ...


    By Inderscience Publishers

  • Forensic applications including mapping and classification of tsunami sand deposits and sand dunes with ground penetrating radar

    The coastal region experiences erosional, transportational and depositional events during mega events such as tsunami. The onshore deposits are significant in determining the past events of high–energy events in the coastal region. The Optically Simulated Luminescence (OSL) dating of the sediments by combining Ground Penetrating Radar (GPR) records will reveal the past tsunami events. OSL dates ...


    By Inderscience Publishers

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