His professional experience includes 4 years as a forensic scientist with the New Jersey State Police and 11 years as a supervising forensic scientist with the Office of Chief Medical Examiner in New York City. In New York City, he supervised forensic scientists who analyzed physical evidence in over 1,000 sexual assault or homicide cases. He worked on the World Trade Center Identification Project as a molecular biology consultant and has provided expert courtroom testimony in more than 100 cases. He has authored or coauthored more than 15 publications in peer and editorial reviewed journals and given nearly 50 presentations at professional conferences.