Evidence analysis and processing

Fractography is a tool for studying material failure. Analysis of cracks and fractures can reveal information about how, why, and where a fracture initiated and how a crack traveled, providing insight into the cause of failure. This webinar provides a basic introduction to forensic fractography of bone, which represents a new model for skeletal trauma that emphasizes understanding the cause of material failure rather than simply classifying fracture patterns.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on November 2, 2022.

This webinar will review the features and advantages of the Idaho State Police Forensic Services’ freely available sexual assault kit evidence tracking system.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on April 7, 2022.

This webinar is designed to provide a peek behind the curtain of cosmetics, specifically those applied to the face. The presenter will provide an overview of common cosmetic ingredients, including the typical usage levels and their purpose in these products. The presenter will also discuss various analytical approaches and limitations to the analysis of cosmetic products and their individual components.

This webinar was hosted by the NIJ Forensic Technology Center of Excellence on February 17, 2022. 

The FBI Laboratory conducted a comprehensive study known as the National Footwear Database Evaluation. The purpose of the study was to determine the feasibility of developing and implementing a national footwear database system to generate criminal intelligence for law enforcement and serve as a tool for forensic science researchers. This webinar will highlight the team's findings, conclusions, and recommendations. T

his webinar was hosted by the NIJ Forensic Technology Center of Excellence on February 15, 2022.

The widespread use of handheld smartphones and other devices capable of recording audio and video means that user generated recordings (UGRs) are increasingly presented as evidence in criminal investigations. Combined with other recordings from law enforcement systems, home surveillance systems, etc., the availability of UGRs may offer important audio forensic insights. Forensic handling of UGRs requires best practices for assessing authenticity and integrity of the recorded information.

This webinar describes a simple and systematic method for comparing fracture fits using standardized qualitative and quantitative criteria. An extensive database of nearly 9,000 samples of duct tapes, automotive polymers, and textiles is used to estimate performance rates and strengthen the scientific foundations of fracture fit determinations. Also, the consistency of results from inter-laboratory studies shows the utility and reliability of the proposed approach.

Although iron-based metals are popular for making critical parts of firearms, they are susceptible to corrosion or rust. There is currently little research on how long a firearm can be left to rust before an identification is no longer possible. This project evaluates the effects of rust on the common working surfaces of Glock and Smith & Wesson Sigma firearms.