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You are here: Home / Archives for NIJ

NIJ

Study Assesses the Accuracy and Reproducibility of Bloodstain Pattern Analysis

December 14, 2022 //  by Sarah Olson

Black box study of bloodstain pattern analysts finds contrasting conclusions due to terminology; highlights importance of establishing consensus standards.

Study Assesses the Accuracy and Reproducibility of Bloodstain Pattern AnalysisRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Blood and Bodily Fluids

The Forensic Microbiome: The Invisible Traces We Leave Behind

June 7, 2021 //  by Sarah Olson

The Forensic Microbiome: The Invisible Traces We Leave BehindRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Blood and Bodily Fluids, DNA, Foundations of Forensics

Field Sobriety Tests and THC Levels Unreliable Indicators of Marijuana Intoxication

April 5, 2021 //  by Sarah Olson

Researchers investigated how marijuana affects skills required for safe driving and found that biofluid levels of THC did not correlate with field sobriety test performance or marijuana intoxication, regardless of how the cannabis was ingested.

Field Sobriety Tests and THC Levels Unreliable Indicators of Marijuana IntoxicationRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Toxicology

Forensic Footwear Reliability

October 19, 2020 //  by Sarah Olson

Three NIJ-funded research articles on the reliability of footwear comparisons were published in 2020. Part I—Participant Demographics and Examiner AgreementPart II—Range of Conclusions, Accuracy, and ConsensusPart III—Positive Predictive Value, Error Rates, and Inter-Rater Reliability

Forensic Footwear ReliabilityRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Fingerprints

Improving a Database to Help Identify a Vehicle by Using Paint Fragments

October 6, 2020 //  by Jessica Phipps

For years, investigators have relied on the Paint Data Query database to identify the make of a vehicle by matching the physical attributes, chemical composition, and infrared spectrum of the paint, primers, and clear coating layers. However, there are concerns with the database, generic coding being one of them.

Improving a Database to Help Identify a Vehicle by Using Paint FragmentsRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Trace Evidence

Linking Suspects to Crime Scenes with Particle Populations

October 6, 2020 //  by Jessica Phipps

Two scientists with a long record of research into the forensic value of very small particle populations examined cell phones, handguns, drug packaging, and ski masks from the San Diego County Sheriff’s Office examine whether such particles are valuable as physical evidence.

Linking Suspects to Crime Scenes with Particle PopulationsRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Trace Evidence

Microbial Communities on Skin Leave Unique Traces at Crime Scenes

October 3, 2020 //  by Jessica Phipps

Two related NIJ-supported studies evaluated the possibility of using an individual’s skin microbiome — a community of microorganisms that inhabit a specific environment — as a form of trace evidence from evidence found at a crime scene. The first study, led by Dr. Rob Knight of the University of California, San Diego, examined whether the …

Microbial Communities on Skin Leave Unique Traces at Crime ScenesRead More

Resource Category: Featured ArticlesResource Source: NIJForensic Discipline: Trace Evidence

Fire Research: Identifying Ignitable Liquids in Debris and Providing Error Rates to Strengthen Testimony

October 3, 2020 //  by Jessica Phipps

With funding from the NIJ, Dr. Michael Sigman and Mary Williams from University of Central Florida developed a method for analyzing fire debris samples that are highly contaminated with pyrolysis interferences. This technique provides an alternative objective method for classifying ignitable liquid residues, which is one of the only viable options for helping to progress …

Fire Research: Identifying Ignitable Liquids in Debris and Providing Error Rates to Strengthen TestimonyRead More

Resource Category: Reports and PublicationsResource Source: NIJForensic Discipline: Trace Evidence

Making Use of What’s Not Visible in Trace Evidence Examinations

September 12, 2020 //  by Jessica Phipps

Nanoparticles and other subvisible particles potentially present in nearly all trace evidence are often overlooked in forensic investigations. NIJ-supported researchers have characterized several types of particles and developed detection methods.

Making Use of What’s Not Visible in Trace Evidence ExaminationsRead More

Resource Category: WebsitesResource Source: NIJForensic Discipline: Trace Evidence

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