Cold Case Expert Witnesses

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...

Cameron Park, California

Police Practices & Procedures, Law Enf & Criminal Justice - Civil Rights, Interrogations, Police Practices, Search & Seizure, Laws of Arrest, Wrongful Conviction, False Arrest, Officer Involved Shootings, Homicide, Crime Scenes, In-Custody Deaths, Criminal Investigations, Jails & Prisons, Admin Investigations, Cell Phone Analysis, Probable Cause, Violent Crimes, Cold Case, Jails, Prisons

I am a retired Sergeant with the Sacramento County Sheriff's Office. I have over 30 years of law enforcement experience. I am a Police Practices Expert with a wide range of expertise, including but not limited to, Major Crime Scene Management, Homicide Investigations, Criminal Investigative Practices, Cellular Phone Forensic Analysis, Officer Involved Shooting Investigations, In-Custody Deaths, Interview & Interrogation Techniques (both Reid and Science Based), and other in-depth investigations, including Conspiracy, Robbery, Missing Persons, Kidnapping, Murder for Hire, Gang Related Crimes, and Narcotics. I provide consulting and expert witness services specializing in extensive and in-depth case reviews, analysis, and independent and objective opinion development for thorough Rule 26 reports and testimony. I am an instructor with California POST Robert Presley's Institute of Criminal Investigations including Investigators Core, Homicide Investigations, Officer Involved Shooting ...