Forensic Science Expert Witnesses in Arizona

Scottsdale, Arizona

Forensic Science, Law Enf & Criminal Justice - Forensic Genetic Genealogy, Investigative Genetic Genealogy, DNA Case Review, Familial DNA Analysis, Cold Case, Unidentified Human Remains, STR and SNP DNA Analysis, Genealogical Tree Building, Wrongful Identification, Alternative Suspect Analysis, DNA Investigative Errors, Law Enforcement DNA Practices

I am a retired law enforcement detective and an active forensic genetic genealogist specializing in the review, evaluation, and application of DNA-driven investigative techniques in criminal cases. My work focuses on forensic genetic genealogy (FGG/IGG/FIGG), including the use of SNP DNA testing, genealogical tree construction, familial DNA analysis, and investigative logic used to identify or exclude persons of interest. I assist attorneys in evaluating whether genetic genealogy methods were applied appropriately, ethically, and within accepted investigative standards. I have over 25 years of experience in criminal investigations, including homicide, violent crime, and cold cases. Since transitioning into forensic genetic genealogy, I have worked cases involving unidentified human remains, suspect identification, investigative missteps, and vendor-driven DNA errors. I am frequently consulted to review law enforcement and third-party vendor genetic genealogy work for accuracy, met...

Laveen, Arizona

Forensic Science, Firearms & Ballistics - Crime scene, DNA, Evidence, Biology, Chain of Custody, Controlled substances, DUI, Blood alcohol analysis, Criminalist, Forensic Quality Assurance, Evidence collection, Evidence integrity, Firearm Identification

Previously certified in Comprehensive Criminalistics by the American Board of Criminalistics, Deborah Stonebarger provides rigorous evaluation of forensic evidence, laboratory analyses, crime scene processing, and evidence collection. She has provided expert testimony in crime scenes, evidence collection and evidence integrity, forensic firearms identification, blood and breath alcohol analysis including impairment, and crime lab procedures. She assists in identifying errors and helps to support defense strategy. Deborah worked for 16 years for the California Department of Justice Bureau of Forensic Services. She helped process DNA samples to build California’s Offender DNA Database while working at the DNA laboratory, and was a recipient of the Attorney General’s Team award for this endeavor. She also worked at regional laboratories in Eureka, California and Redding, California where she assisted with crime scene processing and evidence testing for numerous law enforcement age...