Interpol review of paint, tape, and glass evidence 2019–2022

Almirall, José R.; Trejos, Tatiana

doi:10.1016/j.fsisyn.2022.100306

Cited by 4 publications

(1 citation statement)

References 151 publications

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“…Since his pioneering discourse in 1920, Edmond Locard’s theory that “every contact leaves a trace” in criminal activities has been a foundational aspect of modern forensic science, particularly in crime scene investigation (CSI) and reconstruction . Trace forensic evidence can come from a variety of sources, including more traditional sources ( e.g ., hair, fibers, paint and adhesives, gunshot residue, and soil) and emergent areas of interest ( e.g , “touch” DNA). Correspondingly, guiding bodies such as the Scientific Working Group on Materials Analysis (SWGMAT) and NIST Organization of Scientific Area Committees for Forensic Science (OSAC) Trace Materials Sub-Committee have recognized several collection methods specifically for these evidence types, such as tweezing, scraping, and adhesive lifting; vacuum collection is also employed, − albeit in a targeted manner, where the filtration media cartridges used are stored for integrity and processed at off-site facilities.…”

Section: Introductionmentioning

confidence: 99%

Application of a Modified 3D-PCSI-MS Ion Source to On-Site, Trace Evidence Processing via Integrated Vacuum Collection

Bondzie,

Adehinmoye,

Molnar

et al. 2023

J. Am. Soc. Mass Spectrom.

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Trace evidence, including hair, fibers, soil/dust, and gunshot residue (GSR), can be recovered from a crime scene to help identify or associate a suspect with illegal activities via physical, chemical, and biological testing. Vacuum collection is one technique that is employed in recovering such trace evidence but is often done so in a targeted manner, leaving other complementary, chemical-specific information unexamined. Here, we describe a modified 3D-printed cone spray ionization (3D-PCSI) source with integrated vacuum collection for on-site, forensic evidence screening, allowing the processing of targeted physical traces and nontargeted chemical species alike. The reported form factor allows sample collection, onboard extraction, filtration, and spraybased ionization in a singular vessel with minimal handling of evidence by the operator. Utilizing authentic forensic evidence types and portable MS instrumentation, this new method was characterized through systematic studies that replicate CSI applications. Reliability in the form of false positive/negative response rates was determined from a modest, user-blinded data set, and other attributes, such as collection efficacy and detection limit, were examined.

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