Areas of Expertise: DNA Forensics; Evidence Analysis & Spoliation; Fingerprints; Firearms & Ballistics; Forensic Photography; Criminal Forensics; Crime Foreseeability; Crime Scene Analysis; Criminal Investigations; Sexual Abuse & Assault; Child Sexual Abuse; Child Sex Abuse; Law Enforcement; Police Procedures; Stalking; Weapons; Biotechnology; Analytical & Consulting Labs; Laboratory Testing; Biology & Botany; Human Factors; Microbiology & Biochemistry; Genetics.
Mr. DeLeeuw is a highly regarded and accomplished Forensic Biology and DNA Consultant/Expert both nationally and internationally. He has over two decades of dedicated experience in molecular biology and forensic science and is well respected worldwide. His career is defined by a deep technical mastery of DNA analysis, including specialized expertise in interpreting complex multi-contributor samples using Probabilistic Genotyping Software (PGS) such as STRmix.
Mr. DeLeeuw is licensed by the Texas Forensic Science Commission. He likewise has a comprehensive understanding of FBI Quality Assurance Standards (QAS) and ISO/IEC 17025 accreditation requirements. He applies the standards through meticulous auditing of case files, bench notes, and high-volume electronic data files and images.
His extensive professional background includes high-level roles across private and public sectors. As a Forensic DNA Analyst at DNA Labs International, Mr. DeLeeuw analyzed casework from across the United States and internationally, utilizing advanced PCR/STR-based methods and various chemistries. Prior to this, he served for nearly 20 years as a Forensic Scientist for the Michigan State Police, where he performed biology and DNA casework, responded to crime scenes for evidence collection, and acted as an Assistant to the Local CODIS Administrator. Currently, Mr. DeLeeuw also serves as an Application Consultant for Forensic Advantage Systems, leading the implementation of LIMS applications and translating complex business requirements into technical workflows.
Beyond the laboratory, Mr. DeLeeuw is a seasoned Expert Witness, qualified to provide testimony in Body Fluid Identification/Serology and DNA Analysis across numerous jurisdictions. He has provided sworn affidavits and oral testimony in federal, circuit, and district courts in many states including Washington D.C., and internationally in the Royal Turks and Caicos Islands. His ability to translate sophisticated molecular biology data into clear, accessible testimony ensures that scientific integrity remains paramount during both civil and criminal litigations.
Mr. DeLeeuw maintains technical proficiency through a rigorous commitment to continuing education, frequently attending the International Symposium on Human Identification and National CODIS Conferences. His hands-on experience spans a wide array of instrumentation, including Applied Biosystems Genetic Analyzers and Hamilton robotic workstations, as well as various quantification and amplification kits. This combination of technical expertise, regulatory knowledge, and proven courtroom experience allows him to provide unparalleled oversight and analysis in the field of forensic DNA as outlined in the Curriculum Vitae attached below.