Michael P. Heiskell is the owner of the firm Johnson Vaughn & Heiskell in the Fort Worth/Dallas area. As a former state and federal prosecutor his practice focuses of criminal defense-primarily white collar. He also represents civil rights litigants. Michael is past President of the Texas Criminal Defense Lawyers Association, the Tarrant County Criminal Defense Lawyers Association and the Galveston County Young Lawyers Association. He is former Chair of the Advisory Committee for the Northern District of Texas and Trustee of the Bar Foundation. In 2015 he was elected to the Texas Criminal Defense Lawyers Association’s Hall of Fame.
In 2020 he was selected as the recipient of The Blackstone Award, the highest honor bestowed upon a member of the Tarrant County Bar Association. Michael is a graduate of Baylor University and the Baylor University School of Law.
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Challenging Carceral Forensic Software
This program arms defense attorneys with the legal strategies and technical understanding needed to challenge software evidence at every stage: expert qualifications, reliability under Rule 702, confrontation rights, discovery, due process, and more. You'll learn how to cross-examine government witnesses who rely on black-box technology they don’t truly understand—and how to force the court to take a closer look at what's really driving forensic conclusions. Learn how STRmix, TruleIO, ShotSpotter, and AI-generated sketches are marketed as scientifically validated, yet often evade scrutiny.
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Pattern Cross-Examination for Digital Forensic Experts
This guide provides ready-to-use cross-examination questions, categorized by artifact type and case theme—from cell phone towers to deleted texts to smart devices and cloud forensics. Whether you’re handling a case involving child exploitation, stalking, or online fraud, this book delivers practical patterns designed to highlight sloppy forensics, bias, tool limitations, and assumptions of intent or identity. Defense attorneys don’t need a computer science degree—they need strategy, control, and the right questions to challenge the illusion of digital certainty in court.
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Using Chat GPT in Criminal Cases - Writing Better Prompts
Want a motion written in plain language but grounded in Tennessee case law? Need a summary of Fourth Amendment jurisprudence with primary and secondary citations? This is where you learn how to get that—on demand, and with far less editing. This training is designed specifically for attorneys—busy professionals who need fast, accurate, and case-relevant AI support. Whether you’re drafting motions, brainstorming legal strategy, summarizing complex case law, or preparing cross-examinations, the quality of your AI output comes down to one thing: how you ask for it.
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Alcohol, Blackouts and Consent in Sex Cases
This comprehensive training program provides defense attorneys with a rigorous, science-backed approach to dismantling prosecutorial narratives, exposing unreliable testimony, and ensuring that juries are properly educated on the complexities of memory, intoxication, and consent. You'll explores critical mistakes and misconceptions encountered in these cases, including errors in memory reconstruction after an event, incorrect inferences, cognitive schemas, suggestibility, contamination and misinformation, mistakes of fact and more.
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Overcoming the Presumption of Guilt and Defining Reasonable Doubt
Reasonable Doubt, what is it?
In order to win criminal cases, the defense practitioner must object to a reasonable doubt standard that lowers the burden of guilt. This program will discuss proven methods to argue and define reasonable doubt persuasively to a jury. You’ll learn how define reasonable doubt using metaphors and hypothetical scenarios that force juries to dispute the evidence, conflicts in the evidence, or even lack of evidence in your case.
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The DIY of DNA: Exoneration Through DNA Evidence
This presentation might be the first time you’re truly able to truly grasp the fundamentals of DNA evidence. This critical presentation blends real-world storytelling with clear, practical instruction—making DNA evidence finally feel accessible, even to non-scientists—while inspiring attorneys to dig deeper, ask smarter questions, and approach forensic science with newfound confidence. You’ll learn how to identify and interpret electropherograms, understand autosomal vs. Y-STR testing, and recognize the limits of DNA evidence—particularly when it involves partial or mixed samples.
