Forensics Talks

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In Episode 113 of Forensics Talks, I speak with Dr. Rasmus Rosenberg Larsen from the University of Toronto about psychopathy, forensic psychology and the scientific basis behind one of the most widely recognized concepts in criminal behaviour. Drawing on his book Psychopathy Unmasked: The Rise and Fall of a Dangerous Diagnosis, we discuss what psychopathy actually means, how tools such as the PCL-R are used in forensic assessments, and how those assessments can influence decisions involving risk, treatment, sentencing, parole and corrections.  

A major focus of the discussion is Dr. Larsen’s critical examination of long-standing assumptions about psychopathy, including whether so-called psychopaths are exceptionally dangerous, incapable of empathy, resistant to treatment, or biologically distinct. We also look at the importance of validation, effect size, null findings and scientific skepticism when forensic concepts are being used to make decisions that can have serious consequences for individuals within the justice system. His book challenges several of these traditional claims and argues that the evidence deserves much closer scrutiny.  

Originally aired on October 1, 2026

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Body-worn cameras have become one of the most important tools in modern policing — not just for transparency, but for investigations, evidence collection, and courtroom testimony.

On this episode of Forensics Talks, I’ll be speaking with Bryan Chiles, Senior Manager of Axon Forensics, about how Axon body cameras are helping shape the future of law enforcement. Bryan has been with the company since 2005 and has played a key role in developing and testing both TASERs and body-worn cameras. Today, he serves as an expert witness in cases involving Axon technologies and works closely with legal and forensic teams around the world.

We’ll talk about how Axon cameras handle authentication, SHA256 hashing, chain of custody, automatic activation, and more — and why these technical features matter when it comes to reconstructing events, reviewing use of force, and building solid cases.

Originally aired on: October 16, 2025

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In this episode of Forensics Talks, we're tuning in to the science of sound with Henry Vega, Forensic Engineer at JS Forensics Consulting.

Henry will walk us through how dashcam audio recordings can be used to calculate vehicle speed, how tire frequencies are analyzed in real-world crash cases, and how firearm discharges captured on officer bodycams are helping uncover key evidence. We'll also explore his collaborations with experts around the world pushing the boundaries of audio-based forensic reconstruction.

If you’ve ever wondered how much information is hidden in a sound file — this is the episode for you.

Originally aired on: August 7, 2025

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Injury Mechanics & Forensic Science | EP110 | Lisa P. Gwin | July 10, 2025 | 2 PM Eastern

Join us for a fascinating conversation with Lisa P. Gwin — a biomechanical consultant, physician, engineer, and former firefighter. With a background that spans emergency medicine, automotive engineering, and injury biomechanics, Lisa brings a truly unique perspective to forensic investigations.

In this episode, we’ll explore how biomechanics helps answer key questions in injury cases: What caused the injury? Was it consistent with the reported event? How do forces interact with the human body? We’ll also discuss the critical role of expert witnesses in court and Lisa’s reflections as she prepares to retire from an extraordinary career.

Don’t miss this chance to hear from one of the most well-rounded experts in the field of forensic biomechanics.

Originally aired on: July 10, 2025

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Geographic Profiling | EP109 | Douglas MacGregor | June 26, 2025 | 2 PM Eastern

Join us for Episode 109 of Forensics Talks as we welcome Douglas MacGregor, consultant and IRIS team member, who brings deep expertise in environmental criminology and forensic intelligence analysis. In this session, we’ll explore how geographic profiling helps investigate serial and violent crime, locate missing persons, and support complex investigations involving human trafficking, organized crime, and cold cases.

Douglas will walk us through the practical applications of geographic, spatial, and behavioral data in law enforcement. From crime mapping to locating human remains, learn how these advanced strategies are shaping the future of investigative support and public safety.

Originally aired on: June 26, 2025

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HemoVision | EP108 | Philip Joris | Jun 5 2025 | 2 PM Eastern

Join us for a deep dive into the intersection of forensic science, Bloodstain Pattern Analysis and Machine Learning with Philip Joris, co-founder of Forentrics and developer of HemoVision, an advanced tool for bloodstain pattern analysis.

In this episode, we’ll explore how Philip’s background in electronics, AI, and medical imaging led to the creation of powerful computational tools for crime scene investigation. Learn how HemoVision supports investigators in reconstructing bloodstain patterns, enhancing objectivity, and visualizing complex scenes with cutting-edge technology.

Don’t miss this conversation on the future of digital forensics, the evolution of BPA, and the role of AI in modern crime scene reconstruction.

Originally Aired on: June 5, 2025

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Death at High Altitude | EP107 | Dr. Robert Kurtzman

Join us for a compelling discussion with Dr. Robert Kurtzman, forensic pathologist and former Montana State Chief Medical Examiner, as we explore the challenges of conducting forensic death investigations in high-altitude environments. From hypoxia-induced conditions like HAPE and HACE to other conditions such as carbon monoxide poisoning or lightning strikes, Dr. Kurtzman will walk us through the forensic complexities of high altitude deaths and how these unique environments have effects on decomposition and casework.

Don't miss this episode as we examine the physiological, pathological, and investigative factors surrounding altitude-related fatalities — and why proper scene context, medical history, and postmortem practices are essential to determine the correct cause and manner of death.

Originally aired on May 15 2025 | 2 PM Eastern

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BPA Black Box Study | EP106 | Kevin Winer | OCT 24 2024 | 1PM

Join us for Episode 106 of Forensics Talks on October 24, 2024, at 1PM Eastern Time, featuring Kevin Winer, Director of the Kansas City Police Crime Laboratory. With decades of expertise in bloodstain pattern analysis, Kevin will delve deep into the findings of the NOBLIS Black Box Study on the accuracy and reproducibility of conclusions by forensic bloodstain pattern analysts.

This landmark study reveals critical insights into the complexities and challenges faced by analysts in interpreting bloodstain patterns at crime scenes, shedding light on the pressing need for improved standards and practices in forensic science.

You don't want to miss this enlightening discussion that not only explores the intricate details of forensic bloodstain analysis but also raises vital questions about the reliability of forensic evidence used in courtrooms. Whether you're a forensic professional, student, or simply a science enthusiast, this episode will equip you with a better understanding of the forensic world and its impact on justice.

Originally aired on: October 24, 2024

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Privately Manufactured Firearms | EP 105 | Kirk Garrison | SEP 26 2024 | 2PM Eastern

Join us for Episode 105 of Forensics Talks on September 26, 2024, at 2 PM Eastern, as we dive into the complex world of privately manufactured firearms with Kirk Garrison of the San Bernardino County Sheriff's Department.

With a diverse background starting in Biology to teaching and then transitioning into law enforcement and forensics, Kirk brings a unique perspective to the table. Starting his forensic journey in California in 2013, he has climbed the ranks from managing an evidence room to becoming an expert in firearms and toolmarks at the county crime lab.

In this episode Kirk will share his experience with "80% kits" and the emerging challenges posed by 3D-printed firearms components, such as "Glock-switches." His work in the firearms and toolmarks unit has also led him to explore innovative forensic techniques, including the analysis of nozzle marks from 3D-printed parts to determine their reproducibility.

Kirk's ongoing research and his efforts to publish findings on the use of the Unified Score for NIBIN correlation reviews highlight the evolving nature of firearm forensics. 

Tune in as we explore how these developments affect law enforcement and public safety, and what measures can be taken to regulate and track privately manufactured firearms effectively.

#ForensicsTalks #KirkGarrison #FirearmForensics #3DPrinting #LawEnforcement #PublicSafety #Episode105

Originally aired on: September 26, 2024

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Forensic Audio Analysis | EP 104 | David Notowitz | SEP 19 2024 | 2PM Eastern

David Notowitz, a seasoned expert in forensic audio analysis and is the founder and lead forensic expert of the National Center for Audio and Video Forensics in Los Angeles, has dedicated over three decades to advancing the field of digital forensics. His expertise lies in uncovering truths hidden within audio and video recordings, which plays a crucial role in both criminal investigations and civil proceedings.

David's extensive career includes collaborations with law enforcement agencies and legal teams across the globe, where he applies his skills in extracting, preserving, and analyzing digital evidence. His work not only aids in solving cases but also focuses on educating legal professionals and the public about the importance and intricacies of digital evidence. As a passionate advocate for truth, David regularly engages in public speaking to share his knowledge and insights on the impact of technology on justice and media integrity.

In this episode, David will discuss the challenges and advancements in forensic audio analysis, the tools and techniques that are at the forefront of the field, and his experiences with high-profile cases. Don’t miss this deep dive into the world of forensic audio analysis, where every sound tells a story.

Originally aired on: September 19, 2024