U.S. flag

An official website of the United States government, Department of Justice.

Democrats have shut down the government. Department of Justice websites are not currently regularly updated. Please refer to the Department of Justice’s contingency plan for more information.

Toxicology

Seized Drugs and Toxicology Research and Development; 2022 NIJ Forensic R&D Symposium

March 2022

The NIJ Forensic Science Research and Development Symposium is an open meeting where attendees can learn about NIJ-funded research across a variety of forensic science areas. This is one of four videos from the 2022 symposium, which was held March 1-2, 2022.

Presentations include - 

2022 NIJ Forensic Science Research and Development Symposium

The NIJ Forensic Science Research and Development Symposium is an open meeting where attendees can learn about NIJ-funded research across a variety of forensic science areas. The 2024 symposium was was held March 1-2, 2022.

NIJ and its Forensic Technology Center of Excellence are committed to improving the practice of forensic science and strengthening its impact by supporting research and development, rigorous technology evaluation and...

MDI Myth: Rapid Toxicology Screening Tools Can Replace Traditional

October 2024

This session busts the myth that new toxicology screening tools can fully replace traditional toxicology testing. The session discusses the appropriate integration of current rapid toxicology screening tools into MEC offices as a method of triaging cases, rather than a determination of toxicology related causes of deaths.

TOF/QTOF Mass Spec for Identification, Screening & Confirmation in Forensic Toxicology & Chemistry, Part II

October 2023

In this specialized workshop intended for forensic science service providers (FSSPs), we explore the increasing adoption of Time-of-Flight and Quadrupole Time-of-Flight Mass Spectrometry (TOF/QTOF-MS) technologies within forensic laboratories. The session provides an in-depth examination of various critical stages, encompassing planning, validation methodologies, analytical techniques, data review processes, and report generation. Subject matter experts disseminate knowledge and share first-hand experiences related to the utilization of TOF/QTOF-MS technology.

TOF/QTOF Mass Spec for Identification, Screening & Confirmation in Forensic Toxicology & Chemistry, Part I

October 2023

In this specialized workshop intended for forensic science service providers (FSSPs), we explore the increasing adoption of Time-of-Flight and Quadrupole Time-of-Flight Mass Spectrometry (TOF/QTOF-MS) technologies within forensic laboratories. The session provides an in-depth examination of various critical stages, encompassing planning, validation methodologies, analytical techniques, data review processes, and report generation. Subject matter experts disseminate knowledge and share first-hand experiences related to the utilization of TOF/QTOF-MS technology.

2025 NIJ Forensic Research and Development Symposium, Seized Drugs & Toxicology (Session 3)

February 2025

The Forensic Technology Center of Excellence assisted the National Institute of Justice in hosting the annual NIJ Forensic Science Research and Development Symposium on Tuesday, February 18, 2025 at the 77th Annual American Academy of Forensic Sciences meeting in Baltimore, Maryland. This video is one of five recorded sessions from the event. 

Presentations include -

Intro and Basics of Statistics for Forensic Toxicology

May 2024

This session provides an overview of the fundamental principles of statistics as encountered and applied in forensic toxicology. Various elements of statistics are often utilized or relied upon by scientists to describe produced results and to demonstrate if forensic instruments or processes are “working” or “in-control”. Here we establish the basic terminology for the principles of statistical analysis. Participants will begin to be better equipped to interpret and analyze forensic toxicology data accurately and effectively. 

Let’s Talk About Stats

July 2024

In this fireside chat, session six of the the Foundational Statistics for Forensic Toxicology series, panelists include practitioners and experts in forensic toxicology, and subject matter experts for the application of statistics in forensic toxicology. Join us in a dynamic and engaging session to explore common frustrations and challenges experienced in the laboratory, providing participants with valuable insights and practical solutions.

Calculation of Type A Data from Control Data for Measurement Uncertainty

July 2024

Session five of the Foundational Statistics for Forensic Toxicology series will incorporate concepts from earlier sessions and focus on the practical application of control data in estimating Measurement Uncertainty (MU). Rather than a discussion about how to calculate the MU, this session provides practical examples to demonstrate the key elements of the statistical process. Participants will learn how to incorporate control data into MU estimation by leveraging statistical techniques aimed at quantifying the uncertainty associated with measurement processes.

Distributions & Standard Deviation

May 2024

This second session in the  Foundational Statistics for Forensic Toxicology series explores various distributions commonly encountered in forensic toxicology (normal, rectangular, etc.). Participants will learn about the characteristics of these distributions and how they manifest in toxicological data. Also, this session covers statistical measures that can describe and compare distributions, including variance, standard deviation, and relative standard deviation.

Statistical Tests and Hypothesis Testing

May 2024

This third session of the Foundational Statistics for Forensic Toxicology series explores hypothesis testing, a fundamental concept in statistical analysis, and its applications in forensic toxicology. Participants will gain an understanding of the different types of statistical tests, their respective applications, and how they can be utilized to uncover meaningful insights from toxicological data. 

Use of Controls and Other Control Chart Elements

June 2024

In this fourth session of the Foundational Statistics for Forensic Toxicology series, we address common challenges, misconceptions, and questions encountered in day-to-day forensic toxicology laboratory settings related to statistics. Participants will gain insights into the practical application of statistical concepts and terminology in quality control and control charting, including trends and outliers. Furthermore, participants will learn about data interpretation, distinguishing between results that occur due to statistical significance and those the occur due to random variation.

Foundational Statistics for Forensic Toxicology

This six-part webinar series provides a fundamental knowledge base in statistics before advancing into more complex concepts. This series aims to address common questions that arise in forensic toxicology and to increase both the attendees’ confidence of what they know and the awareness of what they have yet to learn. Commonly encountered data types and both descriptive and inferential statistics will be defined and discussed...

Things Are Not What They Seem A Collection of Interesting Case Studies

May 2022

With the rise of illicit fentanyl, fentanyl analogues, synthetic cathinones, xylazine, and other substances adulterating many traditional street drugs, users often have no idea what they are consuming, leading to overdose and death.  This further complicates toxicology testing and death determination.  This presentation will cover interesting postmortem case studies from Ohio, Denver, and Miami from the scene perspective through autopsy and toxicology testing.