Research & Education JFS Articles AAFS Connect Conference Proceedings Reference Series Library International Educational Outreach Program High Concentrations of Illicit Stimulants and Cutting Agents Cause False Positives on Fentanyl Test Strips Presenting section: Criminalistics 2021 Lockwood, Tracy-Lynn E., South Bend IN; Vervoordt, Alexandra, Notre Dame IN; Lieberman, Marya, Notre Dame IN View the paper Criminalistics