Forensic Experts

Joel M. Silberberg, MDJoel M. Silberberg, MD

Professor and Chief of the Division of Forensic Psychiatry

On July 1, 2016, Joel Silberberg, MD joined the UF Department of Psychiatry as Professor of Psychiatry, Chief of the Division of Forensic Psychiatry, Program Director of the Residency Training Program for Forensic Psychiatry and Chief of Telepsychiatry.

Dr. Silberberg earned his Medical Degree from the University of Witwatersrand in South Africa.  Followed by a Surgery and Internal Medicine Internship at Coronation Hospital, Newclare, Transvaal he began his PGY1 year in Anesthetics before moving to the UK to practice Anesthetics and General Practice.  He then moved to USA to complete his Residency in Psychiatry at Stritch School of Medicine, Loyola University of Chicago in Illinois where he became a Tenured Professor and spent 14 years as Director of Medical Student Education in Psychiatry.

Dr. Silberberg has experience practicing in both the private and academic sectors of psychiatry. Prior to joining the University of Florida, Dr. Silberberg was Director of Madden Mental Health Center, a 220 bed State Hospital in Hines, Illinois and then Director of Mental Health Services at Cermak Health Services of Cook County, the largest public health facility in Illinois.  Dr. Silberberg has created and led Forensic Psychiatry Fellowship Training Programs in Texas and in Illinois. In Chicago, he was Director, Division of Forensic Psychiatry and Director, Division of Psychiatry and the Law at Feinberg School of Medicine at Northwestern University, Chicago, Illinois, and an Associate Professor at the Northwestern Law School.

Most recently, Dr. Silberberg was an attending psychiatrist at University Medical Center in Las Vegas, Nevada where he practiced Consultation Liaison/Emergency Psychiatry and Telepsychiatry as a Professor of Psychiatry with the Department of Psychiatry and Behavioral Sciences at the University of Nevada, School of Medicine. He has always maintained a robust psychotherapy and psychopharmacology outpatient practice and has a nation wide criminal and civil forensic psychiatry practice mainly in Chicago, San Antonio, New York and Las Vegas. He has won numerous teaching awards and is a Distinguished Life Fellow of the American Psychiatric Association.  He and his partner Jazmin look forward to living and working in Gainesville as part of the UF family.


Reisfield-Gary2014-smGary Reisfield, M.D.

Associate Professor

After receiving his medical degree from the George Washington University School of Medicine, Dr. Reisfield completed an anesthesiology residency at the University of Florida and a pain medicine fellowship at the Massachusetts General Hospital/Harvard University.  Dr. Reisfield subsequently served as a hospice medical director and a pain and palliative medicine division chief at the University of Florida in Jacksonville.  As a part of his transition to the University of Florida in Gainesville, Dr. Reisfield completed an addiction medicine fellowship in the department of psychiatry.  Dr. Reisfield is board certified in anesthesiology and pain medicine and is board eligible in addiction medicine and palliative medicine.  He is a clinician-researcher and has authored more than fifty articles and book chapters. He currently serves as a forensic expert in the UF Forensic Psychiatry Division.

Dr. Reisfield’s forensic expertise includes pain management, substance use disorders, diminished capacity due to intoxication and other impairment issues.



Martha E. Brown, M.D.

Associate Professor

Dr. Martha Brown attended medical school, and completed her residency and fellowship at the Medical University of South Carolina. After graduation, Dr. Brown moved to New Orleans where she was an Assistant Professor at the LSU Medical School and became Louisiana State Physician Health Program Director. After leading this program for impaired health professionals, developing prevention and treatment for patients from physicians to professional athletes, she was recruited to the University of South Florida (USF) Medical School. At USF she became an Associate Professor of Psychiatry and Director of the Division of Addiction Psychiatry. In 2006, in addition to this position, she became Associate Dean for Faculty Development in the USF College of Medicine.

Dr. Brown also has a long history of being asked to be an expert by State and Federal governmental agencies. She has a number of scholarly and research interests in addiction psychiatry.



Cooke-Brian2013Brian Cooke, M.D.

Associate Professor

Dr. Cooke received his medical training at St. Louis University School of Medicine and trained as a psychiatrist at the University of Maryland/Sheppard Pratt where he was chief resident. After his residency, Dr. Cooke completed a forensic psychiatry fellowship at Yale University.  Currently, Dr. Cooke is an attending physician at the UF Health Shands Psychiatric Hospital and treats patients in the outpatient clinic. He is a medical school course director and instructor. Dr. Cooke has provided forensic expertise in cases involving sanity, competency, risk assessment, medical malpractice, guardianship, and testamentary capacity.





Natalie Colapelle-Snodgrass, MD Adjunct Assistant Professor

Natalie Snodgrass, MD

Adjunct Assistant Professor

Natalie Snodgrass, MD is a board certified forensic psychiatrist who trained in adult, child and forensic psychiatry at the University of Florida. In addition to these qualifications she is also certified to perform on examining committees to determine an individual’s capacity to care for their needs and to participate in decisions in which they are affected.